HCSA Exam V8 Print.docx
June 24, 2023 | Author: Anonymous | Category: N/A
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HCSA TEST (A) Company:: ________________Name: ______________ Mark: Company ____________ Notce: You are supposed o fnish his es in 1 hour. No discussion should be permied
during he process. Thanks or your coopera cooperaton! ton!
1. True rue or F Fal alse se (34 (34*1 *1)) 1. H.265/High E Eciency ciency Video Coding (HEVC) is he successor codec o o H.264. The primary
goal o he new codec is around 50 percen beer compres compression sion eciency han H.264.
( True ) 2. By adop adoptng tng Predictv Predictve e Encodi Encoding, ng, Noise S Suppression uppression and LongLong-erm erm Bir Birae ae Conrol,
Hikvision H.265+ can save he bandwidh grealy in cerain scenarios. ( True )
3. When he sensor siz size e is fxed, longer ocal ocal lengh will make make large FOV. FOV. When he ocal ocal lengh is fxed, larger sensor size will make large FOV. ( False ) 4. Flow analysis camera can coun coun how m many any people in a cer cerain ain region, a and nd heir w waitng aitng
tme. (True) 5. Compared o 10 1080P 80P,, 1080P lie can ge almos he same qualiy qualiy wih lower birae. birae. ( True True Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
) 6. For Hikvision people countng applicaton, user userss can ge he people ow sats satstcs tcs rom
web clien, iVMS-4200/HikCenral and NVR. ( True ) *** 7. For Hikvision people countng applicaton, user userss can save he people ow s satstcs atstcs even
here is no SD card in he camera. ( False )*** 8. People countng camera can ocus on a arge and rack i untl i disappears in he image, hus eectvely
flering he repeaed coun o he loiering l oiering arge.. ( False ) (preven) *** 9. Hikvision NVR ccan an expor is IP channel as a an n Excel ha is only readable bu no ediable,
and his excel can be impored o anoher NVR o he same model. ( True ) 10.For he applicaton o VCA unctons unctons such as line crossing, objec removal deec deecton, ton, ec.,
NVR has inegraed in is frmware, regardless o IPC models ( False ) (FaceSearch, ) (FaceSearch, Plae,
Hea) 11.ColorVu camera can only provide black &whie image when here is no illuminance
(0lux). ( False ) 12.I an IPC is plugged ino he POE por o an NVR, and NVR is in he same LAN wih he
operaor opera or PC. Then he operaor can enable he NVR virual hos uncton o login he Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
web page o he IPC. ( True ) 13.To 13.T o remoe playback he NVR record fle by ranscoded sream, i requires no only he
NVR, bu also he IP camera should suppor ranscod ranscoded ed sream. ( True )
14.When an IP camera has SD card on board, i will always sore pre-record pre-record videos in he SD
(Triggered riggered or Enable) card, even ANR uncton is no riggered. ( True ) (T 15.In he ANR applicaton scenario, ANR synchronized recording can be ound in he record
fle lis. ( True ) 16.For Hik-connec, Hik-connec, Sharing uncton is no suppored suppored under visior mode ( False ) 17.Hik-Connec visior accoun can’ be upgraded o ocial accoun. (False) 18.To build a RAID 5, a leas 3 hard drives are required. (True) 19.I you orge he device password, you can exac key key fle rom SADP ool and send o
Hikvision echnician or reseng ( True ) 20.Image/Video adjusmen are suppored on playback inerace o NVR 4.0 4.0(( True ) *** 21.Sensitviy should be modesly adjused lower i you wan vehicles insead o he
pedesrian o rigger he alarm. ( False ) 22.Acusense devices fler non-human arge argess by measuring heir emperaur emperaure. e. ( False ) Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
23.When PTZ camera is zooming in or zooming ou, he IR always keeps keeps he same angle and
power. ( True )
24.PTZ smar racking 2.0 suppor suppor human & vehicle classifcaton classifcaton ( True True ) 25.When WDR uncton is enabled, max rame rae can be se as 60 ps ( True ) 26.I we se smar racking duraton as ‘0s’ ‘0s’,, he PTZ camera will always rack he moving
objec untl i is ou o he camera’s coverage. ( True ) 27.ROI (Region o Ineres Ineres) ) uncton assigns more encoding resource o he region o
ineres, ineres , hus o increase he qualiy o he ROI whereas he background inormaton is
less ocused. ( False ) 28.A higher rame rae camer camera a which can reach up o 50/60 ps is advan advanageous ageous when here
are some as movemens in he video sream. ( True )
29.The OSD inormaton such as dae, tme, channel inormaton and even some ex can be overlaid on he live video o Hikvision camera. ( True ) 30.Hikvision cameras can be actvaed via web browser, SADP and clien soware. ( True ) 31.Hikvision NVR can suppor eSA eSAT TA uncton, which can be used or recording or capure
sorage. (True )
Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
32.Transcoded sream can be applied or limied bandwidh, which has nohing o do wih IPC bu is g generaed eneraed by NVR isel isel.. ( ) 33.Incoming bandwidh deermines how much sream ha NVR can receive rom IPC, and
ougoing bandwidh means how much sream can be acquired rom NVR or remoe
usage, like like remo remoe e live view or playback on clien soware. (T (True) rue)
34.Hikvision camera has smar IR uncton which can preven image overexposure overexposure when i is oo close o he arge. ( False )
2. Sing Single le Choic Choice e (33 (33*2 *2)) 1. Which o he ollowing acors will aec he sorage sorage space? ( E ) A. FPS B. Res esol olut uton on C. Nu Numb mber er o o ca came merras D. Vid Video eo comp compre ressi ssion on ype ype E. Al Alll o he he a abo bove ve
2. Which o he ollowing descriptons abou bi ra rae e is wrong? ( C ) A. There are wo ypes o bi ra rae: e: cons consan an bi rrae ae and variable bi rrae. ae. B. Under variable bi rae, rae, he image qualiy is alway alwayss good, where whereas as he bi rrae ae is vvariable. ariable. I is suiable or dynamic scenes. By using VBR, we can estma estmae e he bandwidh/sorag bandwidh/sorage e consumpton. Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
C. he bi rae rae is supposed o be cons consan an bu as a resul, he image qualiy is vvariable ariable when he scene changes a lo. By using CBR, we can estmae he bandwidh/s bandwidh/sorage orage consumpton. D. No None ne o o h he e ab abov ove e
3. Which o he ollowing descripton abou H.265+ is incorrect? ( A ) A.
H.264+ echnology is a kind o inelligen algorihm developed by Hikvision. I
ocuses on he eaures eaures o he surveillance vi video deo and is optmized based on he H.265/AVC. H.265/ AVC. H.265+ decreases he bir birae ae o he surveillance video grealy so as o save save he sysem cos. B.
H.265+ is applicable or scenes wih ew background changes and no requen
moving objecs. C.
I i is a dynamic scene wih many moving objecs all he tme, H.265+ can save hal
o he bandwidh compared wih H.265. D.
I i is fxed scene wih ew moving objecs, by using H.265+ can save 50% o he
bandwidh compared wih H.265.
4. Which o he ollowing saemens is incorrec abou Acusense DVR? ( C ) A. Acuse Acusense nse DVR can fle flerr ou non-h non-human uman ar arges ges.. B. To achie achieve ve als alse e alarm fl fler er,, acuse acusense nse cam camera era sh should ould be dep deploye loyed. d. C. Acuse Acusense nse DVR can accep accep bo boh h a analog nalog and IP ccamer ameras. as. D. Acuse Acusense nse DV DVR R is inegr inegrae aed d wih d deepl eeplearning earning algor algorihm. ihm.
5. For Hikvision camera, which o he ollowing descripton abou day & nigh mode is Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
incorrect ? ( D ) A. A nigh nigh or under lo low w illumina illuminaton ton scen scenes, es, he ccamer amera a swi swich ch rom ccolor olor mod mode e o B/W mode auomatcally, which can improve low-ligh perormance eectvely. B. A newor nework k camer camera a wih day/ day/nigh nigh u uncton nctonaliy aliy has an au auomatc omatcally ally remo removabl vable e inrar inrarededcu fler. fler. The fler is on during daytme, enabling he camera o produce colors as he human eye sees hem. A nigh, he fler is removed o enable he camera o ake advanage advanag e o near inrared ligh and produce good qualiy qualiy,, black and whie images. C. Dieren modes ar are e selec selecable able or day/nigh swich: day day,, nigh, auo, schedule, e ec. c. D. No None ne o h he e ab abov ove e
6. Which o he uncton is recommended in srong backligh conditon o enhance he whole image qualiy? ( B ) A. WDR B. BLC C. HLC D. IR
7. Which o he uncton is recommended in corridor scenario? ( C ) A. ROI B. Targe arge cr crop oppi ping ng C. Roae m mo ode D. WDR
Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
8. Which one o he ollowing unctons is no suppored by Hikvision NVR? ( D ) A. IPC ma manag nageme emen n an and d rec recor ording ding ma manag nageme emen n B. Loc Local al llive ive vie view wa and nd video video pla playba yback ck C. Quick da daa a reriev rerieval al an and d ins insan an ev even en notfc notfcaton aton D. Con Connec nec o a anal nalog og ca camer meras as vi via a BNC ccabl able e
9. Which o he ollowing sa saemen emen regarding Hikvision NVR is not true? ( D ) A. Adding hirdhird-par pary y IPC and Hikv Hikvision ision IPC o o NVR con consume sume NV NVR R incomi incoming ng bandw bandwidh idh B. Remo Remoe e liv live e view an and d remo remoe e pl playba ayback ck cons consume ume NVR ougo ougoing ing ba bandwid ndwidh h C. Main s sream ream,, sub sr sream eam and h hird ird s sream ream o Hik Hikvision vision IP IPC C are all co coun uned ed in NVR’ NVR’ss bandwidh. D. The usa usage ge o inc incoming/o oming/ougoi ugoing ng band bandwidh widh ccan an be mon monior iored ed in NVR llocal ocal GU GUII
10.Which o he ollowing sa saemens emens is not true? ( A ) A. DVR h has as e enco ncodin ding g abi abili liy y whi while le NV NVR R does does no B. NVR has sepa separa rae e incomi incoming ng and ougo ougoing ing bandw bandwidh idh re resric srictons tons while DV DVR’ R’ss bandwid bandwidh h is shared beween incoming and ougoing. C. Turb urbo o HD D DVR VR ccan an acce access ss o o IP ccame amera ra D. DVR ccan an enable enable line crossing crossing a and nd hea hea mapping mapping a a he same tme tme
11.Which o he ollowing sa saemens emens regarding smar playback is not true? ( B ) A. Smar p playb layback ack is a go good od wa way y o inc increas rease e he pla playback yback e ecienc ciency y. B. During sm smar ar pla playback, yback, yo you u can dr draw aw a sel sel-def -defned ned de deecton ecton lin line e or a dee deecton cton ar area ea or smar search o moton deecton, line crossing and inrusion deecton. Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
C. During sm smar ar pla playback, yback, NV NVR R can skip he he pla playback yback o vid video eo oo ooage age wi wihou hou ev even en in ino. o. D. Smar pla playback yback is a pla playback yback mo mode de o NVR, so no nohing hing on IPC n needs eeds o o be conf confgure gured. d.
12.Which o he ollowing sa saemen emen is not true regarding NVR operatons? operatons? ( D ) A. Virua Viruall hos can be be enabled enabled a a NVR local local GUI, GUI, and and web ine inerac race e B. Tran ranscod scoded ed sream sream or liv live e view ca can n be conf confgure gured d in he web in iner erace ace o NVR C. Redu Redundancy ndancy rec recordin ording g can only be applied applied und under er HDD g group roup mode. D. NVR cchanne hannel-z l-zero ero uncto uncton n ca can n be e enable nabled d via iVMSiVMS-4200 4200
13.Which o he ollowing saemens regar regarding ding NVR recording managemen is not true? ( D ) A. File lock ca can n prev preven en h he e lock locked ed fle rom b being eing ov overwri erwrien en even in cy cycle cle rec recordi ording ng mode B. The re recor cord d fle exp expires ires a aer er i rreache eachess he co confgu nfgured red e expire xpired d tme. C. To confg confgure ure he re redunda dundan n rec recordin ording, g, i requir requires es he NVR o sup suppor por RAID unc uncton. ton. D. In HDD quo quoa a mode, eac each h camer camera a can be allocaed wih quoa or he sor sorage age o rrecord ecord fle and capure picure.
14.Which o he ollowing saemen regarding ANR is not true? ( A ) A. In an even even o new nework ork con connecto necton n ailur ailure, e, NVR wih ANR u uncton ncton ccan an auo auomatc matcally ally rerieve and synchronize synchronize he video daa rom IPC when he connecton is resored. B. I re requi quires res IIP P cam camer era a o in ins sall all an S SD D car card. d. C. ANR ccan an b be e confg confgur ured ed on he loc local al G GUI UI o NVR D. ANR sy synchr nchroniz onized ed rec record ord fles ccan an be sear searched ched and p play layed ed back on NV NVR R Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
15.Which o he ollowing sa saemens emens regarding N+1 uncton is not true? ( A ) A. In he N N+1 +1 ho sspare pare ssys ysem, em, N mea means ns he n number umber o o worki working ng NVR an and d 1 mean meanss he number o backup NVR B. I is rec recommen ommended ded o ins insall all h hese ese N+1 de devices vices in h he e same ne newor work k when se seng ng up he N+1 sysem C. Back u up p NVR needs o b be e con confgur fgured ed in ho sspare pare work mode D. I’ I’ss bee beerr o seu seup p he N+1 ssys ysem em i he IP cha channel nnel no. o backup backup NV NVR R is less ha han n he IP channel no. o working NVR.
16.Which o he ollowing sa saemens emens regarding crea creatng tng RAID is not true? ( B ) A. One- One-ouch ouch con confgur fguraton aton and man manual ual crea creaton ton are su suppor ppored ed o crea creae e RAID. RAID. B. One- One-ouch ouch conf confgur guraton aton will cr crea eae e ra raid id 5 by de deaul aul. . C. I you ins insall all 4 HDD HDDss or abov above e or one one-ou -ouch ch con confgur fguraton aton,, a ho spare spare disk will be creaed by deaul. D. I you ins insall all 5 HDD HDDss or abov above e or one one-ou -ouch ch con confgur fguraton aton,, wo ho spare spare dis disks ks will be creaed by deaul.
17.Which o he ollowing uncton is i s NOT suppored by AcuSense camera and NVR? ( C ) A. Fal alse se a ala larm rm f fl ler er B. Qui Quick ck a arg rge e sea searc rch h C. Sr Srobe obe lig ligh h & Audio Audio al alarm arm D. Pe Peop ople le ccou ount ntng ng
Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
18.I you orge your device’s password, you can ( C ) A. Expor Expor devic device’ e’ss QR cod code e or .xml f fle le rom S SADP ADP o ool. ol. B. Impor Impor loca locall GUID fle vi via a local m menu enu or br browse owserr. C. Answ Answer er valida validaton ton ques questons tons via iVMSiVMS-4200 4200 or brow browser ser.. D. Al Alll o he he a abo bove ve..
19.Which o he ollowing saemen is incorrec abou Acusense device? ( D ) A. Hikvis Hikvision ion prov provides ides Acuse Acusense nse analog ca camera mera,, Acusense IPC IPC,, Acusense DVR DVR & NVR. B. Acusense IPC ccan an suppor alse alse alarm fler fler,, i can distnguish distnguish human, vehicle, an and d ohers. C. Acuse Acusense nse NVR ca can n suppor bo boh h als alse e alarm fle flerr and quick ar arge ge search. search. D. So ar ar,, Hikvis Hikvision ion NVR can suppor access accessing ing non-video non-video produc producs, s, like access con conrol rol & video inercom, alarm device.
20. Wha does higher sensitviy mean in behaviour analysis confguraton? ( D ) A. The smaller p porton orton o arge arge pass he relaed area can rigger he alarm. B. The lar larger ger siz size e o he arg arge e ca can n rigge riggerr he ala alarm. rm. C. I has n nohin ohing g o do wi wih h he ssize ize o o he arge arge. . D. I de depen pends ds on h he e scen scenari arios. os. Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
21. Wha does hreshold mean in inrusion deecton? ( B ) A. The tm tme e o he objec objec en eners ers he he region region B. The tm tme e o he objec objec loi loiers ers in in he region region C. The t tme me o he o objec bjec leav leaves es h he e re region gion D. I de depen pends ds on h he e scen scenari arios. os.
22. Which o he ollowing descripton abou nework PTZ dome camera is incorrect? ( D ) A. A pres prese e is a predefne predefned d imag image e positon. positon. F For or he defned defned pr prese ese,, you can click he calling buon o quickly view he desired image positon. Y You ou can confgure up o 300 preses. B. A par parol ol is a memori memorized zed se series ries o pr prese ese u uncton. ncton. T There here ar are e up o 8 parols parols or or cusomizing. A parol can be confgured wih 32 preses. C. A paer paern n is a memoriz memorized ed series series o pan, tl, zzoom, oom, and pr prese ese u uncton nctons. s. I can be ccalled alled on he paern sengs inerac i nerace. e. There are up o 4 paerns or cusomizing. D. No None ne o h he ea abo bove ve..
23. Which o he ollowing descripton abou nework PTZ dome camera is incorrect? ( C ) A. Inital po positon siton is h he e origin o PTZ ccoor oordina dinaes. es. I ca can n be he a acory cory de deaul aul inital positon. By deaul, is pan and tl degree is 0°. Yo You u can also cusomize he inital Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
positon according o your own demand. B. The dome ccan an be pr progra ogrammed mmed o o move wi wihin hin he co confgur nfgurable able limi limi sops sops (le/r (le/righ igh,, up/down). C. The PTZ do dome me came camera ra ca canno nno re resume sume i iss prev previous ious pos positon iton a aer er powe powerr is res resored ored.. D. You are allo allowed wed o d draw raw up o o 24 area areass o priva privacy cy mask in h he e camer camera. a.
24. Which o he ollowing descripton abou smar racking is incorrect ? ( B ) A. When a mov moving ing obje objec c (a per person, son, ve vehicle, hicle, e ec.) c.) en eners ers a mon monior iored ed area area,, Hikvisio Hikvision n PTZ dome cameras can auomatcally deec i and adjus heir ocal lengh o rack he objec; when his objec moves ou o view view,, he camera will auomatcally reurn o is designaed positon. B. I is espe especially cially ap applica plicable ble or si single ngle obj objec ec r racking acking.. Beside Besides, s, you ca can n manual manually ly selec he he objec and sar racking. C. As one o li linkag nkage e modes, modes, smar ra racking cking ccan an be us used ed wih ssmar mar d deec eecton. ton. D. All Hikvi Hikvision sion PT PTZ Z dome came cameras ras suppo suppor r sm smar ar rack racking ing unc uncton. ton.
25. Which o he ollowing descripton is wrong abou ocus issue o PTZ dome camera? ( C ) A. Ther There e are hr hree ee oc ocus us mode: au auo o oc ocus, us, man manual ual oc ocus us and semi-au semi-auo o ocus. ocus. B. SemiSemi-auo auo ocus ocus mea means ns ha ha he spe speed ed dome ocus ocuses es au auomatc omatcally ally only onc once e aer panning, tltng and zooming. Auo ocus means ha he speed dome ocuses auomatcally a any tme according o objecs in he scene. Manual ocus is o ocus Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
manually. C. Minimu Minimum m ocu ocuss dis disance ance is he m minimum inimum di dis sance ance h ha a he le lens ns can ocus. ocus. Th The e lens will no ocus i he monioring disance is less han he minimum ocus disance. Y You ou need o change he minimum ocus disance i he objec is wihin he minimum ocus disance. D. No None ne o h he e ab abov ove e
26. Which o he ollowing saem saemens ens is not true abou ColorVu ColorVu cam camera? era? ( D ) A. Colorvu ccamer amera a has adva advanced nced lens wi wih h F1.0 sup super er aper aperure ure o achi achieve eve brig brigher her im image. age. B. Colorvu ccamer amera a has be beer er sens sensor or sru srucur cure e so i has hig higher her utliz utlizaton aton o ligh ligh. . C. Colorvu ccamer amera a has powe powerul rul IR illumin illuminao aorr, which gene genera rae e chrom chromatc atc imag image e during he nigh D. Colorvu camer camera a does no suppor suppor als alse e alarm fler fler.
27. Which o he ollowing opton can improve he image qualiy a nigh? ( F ) A. AGC B. 3D DNR C. IR D. ICR E. Sw Swi ich ch ro rom m da day y o nig nigh h mo mode de F. Al Alll o o h he above
28.Which acors acors will aec he ban bandwidh dwidh and sor sorage age space? ( D ) A. Vid Video eo comp compre ressi ssion on ype ype Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
B. Scen Scene e ccom ompl plex exi iy y C. Fram ame eR Ra ae D. Al Alll o ab abov ove. e.
29. Which o he descripton abou lens is incorrect? ( C ) A. Lens is cconsis onsised ed o one o orr more gr groups oups o o optcal gla glasses sses.. A lens can ocus ocus lig ligh h o orm orm an image. Dieren combinaton o lens l ens resul in di dieren eren ocal lengh. B. Lens ca can n be divided in ino o vari- vari-ocal ocal leng lengh h and fx fxed ed lens acco accordin rding g o he oc ocal al leng lengh. h. C. When len lenss imagin imaging g size is ssmaller maller han han he se sensor nsor siz size, e, her here e will be black ed edges ges ar around ound he image corners. So we should choose a suiable lens according o is sensor size. D. The amou amoun n o ligh ligh hro hrough ugh he len lenss is meas measured ured by F nu number mber.. F = /D, wher where e is he ocal lengh, and D is he iris diameer diameer.. The bigger he F number is, he bigger he amoun o ligh he camera can ge.
30.Which o he ollowing unctons is no suppored by Hik-Connec? Hik-Connec? ( D ) A. Sh Shar are e de devi vice ce.. B. Sre Sream am En Encr cryp ypto ton. n. C. Alarm p pu ush. D. Peo eopl ple e Co Coun untn tng. g.
Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
31. Which o he ollowing sa saemen emen abou line crossing is incorrec? ( A ) A. Line crossing deecton is recommended or indoor scenarios, no oudoor. oudoor. B. The camera should be mouned in a comparatvely high positon and make sure he arges appearing in he scene will no be oo big. C. Line crossing doesn’ have hreshold seng, bu inrusion deecton has. D. None o above
32. Which o he ollowing saemen saemenss regarding iVMS-4200 is not true? ( C ) A. Hikvisi Hikvision on iVMSiVMS-4200 4200 is more w widely idely ap applied plied in ssmall mall an and d mediu medium m scale proj projecs. ecs. B. Hikvisi Hikvision on iVMSiVMS-4200 4200 is compa compatble tble wi wih h mos o Hikvis Hikvision ion dev devices ices an and d supp supportng ortng dieren kinds o inelligen unctons. C. Hikvisi Hikvision on iVMSiVMS-4200 4200 AC is a ne new w clien ssowar oware, e, which ccan an only sup suppor por acc accessin essing g video surveillance device. D. iVMSiVMS-4200 4200 work works saton aton has pre pre-ins -insalle alled d windows 10 sy syse sem, m, and iVMS-4200 iVMS-4200 clien clien soware, suppors up o 15-ch 2MP decoding perormance.
33. I you have a small shop, and you wan o know which produc is popular, which camera model is recommended? ( A ) A. Hea Hea m mapp apping ing cam camer era a B. Pe Peopl ople e ccoun ountng tng camer camera a C. Beh Behav avior ior a anal nalysi ysiss ca camer mera a D. LP LPR R ca camr mrea ea Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
Hangzhou Hikvision Digital Technology Co., Ltd. All Rights Reserved.
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