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免費 低電壓 視頻 - 頁面 3

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學生坐在桌子上做學校項目
close up shot of the vu meters on a vintage tape recorder in the recording studio
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一名男子在电源断路器的电源保险盒中重新设置了触发的保险丝
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close up view of video vhs device
ai retro rotary telephones
audio device with knobs and rectangular led feedback lights
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men posing for selfie photo
back view of video vhs device
electric fumigator in an electrical outlet on the wall. slider shot
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side view of a man hand plugging and unplugging from the european model wall power socket
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曼谷大街上方 的電線
high voltage electricity pole in key west, florida, usa
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人手插入電話適應器,電池充電器,並開啟使用手機的開關
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hand plugs a fumigator into an electrical outlet - a device for exterminating mosquitoes. 4k video
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animation of 2000 formed with measuring tape over businessman with suitcase and electricity pylons
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調整工作室顯示器的喇<unk>設定的人
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man adjusting the audio settings of a studio monitor
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low angle view of high tension power lines against clouds at dusk
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沿著實驗室台和設備進行追蹤
人在停電時轉動電源開關
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機場周圍 32 公里
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charging adapters switch off and adapters removing in spy guard top view
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一位微笑的白人年輕人深夜在床上在筆記型電腦的鍵盤上打字
many high voltage electrical insulators in power substation against blue sky background
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兩個孩子白天在家裡做電子學校的項目
electric pole power equipment revealing shot with wiring stretching across
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adjusting audio controls
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檢測器 (vumeter) 檢測器(vumeter)檢測機 (vumeter) 測量機 (vumeter)測量器 (vums) 測試機 (vuse) 實驗機(vumse)測試機
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兩個聰明的小朋友在家裡做學校項目
closeup of quantic control panel. selective focus
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details of electronic relay with pulser switch outside panel box - slow motion, slider left
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切断电线的关闭与旧类型的连接器从 crt 监视器
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戴眼鏡的聰明男孩用鐵和<unk>子<unk>接線
女孩晚上在卧室里用镜子在床上化妆
electrical warning loop backdrop. this background is loopable
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person repairing or cleaning an electrical outlet
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兩個孩子在做工程課題的近距離拍攝
close-up of the device of a working electrician checking the presence of voltage in the network
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电线,电缆,电柱,电线和电气设备连接器导体在火灾中燃烧,电气短路危险和风暴后技术问题造成的风险
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电池级别 01 级别
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兩個年輕的同學一起做學校項目
young man practising with the guitar
4k animated gun shot with fire and smoke - cartoon effect, alpha channel enabled
環繞電路板元素的旋轉
modern industrial equipment for sewing in a clothing factory
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vertical shot of students hands as they work on engineering project
兩個聰明的小朋友在練習電氣工程的興趣
close-up of the hand of a caucasian woman holding a key and inserting it into a lock to open a glass door of a store
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woman's hand turning off the fire, on the kitchen
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