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免費 测试仪 視頻 - 頁面 2

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close-up of the device of a working electrician checking the presence of voltage in the network
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沿著實驗室台和設備進行追蹤
scientist operating microscope controls in a laboratory setting
vertical 4k, time counter and spinning audio tape on professional reel to reel recorder player
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student learning how to programing robot
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man and woman doing control at brewery
technician using an oscilloscope to measure electrical signals
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a close-up shot of a grey and black physiotherapy device
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校友用<unk>子压紧锡<unk>线的近距离拍摄
成熟的男性投資者使用電腦
close up of film clapperboard or slate with camera lenses and lighting accessories shooting movie or video in studio
machine for shaking test tubes by vibration to separate the cells and to continue studies
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craftsman making leather wallet
person using a mixing desk
scientist working on a computer in a lab
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electrical tester
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亞洲技術人員使用熱器檢查電線-2的溫度
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technician flipping toggle switches to test electrical equipment in a factory slow motion
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一個聰明的女生正在做一個教育項目
doctor looking dna molecule on computer
woman operator in control room
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vintage electrical measuring instrument
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closeup of a control panel with a telephone
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the device shows vital signs to the doctor
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a close-up view of a laboratory workspace where a technician is adjusting a digital soldering station, the table is scattered with various tools, a microscope, and other electronic equipment
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making medicine factory, medical staff in protective uniform work using tablets to walk and communicate with pharmaceutical facilities at drug manufacturing plant
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vintage scientific equipment in a lab at ventspils international radio astronomy center, latvia
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pharmaceutical manufacturing line. pharmaceutical vials on conveyor line
asian broker analyzing graphics on monitor and smartphone
两名儿童正在进行电气施工的近距离拍摄
close of a hand pulling a lever in a flight simulator cockpit
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hand-held shot of a hand plugging in a cable into a tattoo machine
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man labeling beer bottle
追蹤過去的門近距離
craftman in a home workshop. 4k
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兩個年輕的同學一起做學校項目
human hand pushing buttons on industrial equipment. worker controll production
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closeup: electrodes are connected to multimeter tool and its turned on
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trial and error lab testing of mother earth's natural resources
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兩個聰明的小朋友在做工程學的學校項目
scientist in the lab analyzing water from aqua farming tank with brine shrimps
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industrial control panel with operator
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機械上工作 轉換機上工作
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back view of video vhs device
接近飞行员手动调节无线电管理单元的<unk>杆镜头
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blood analysis in action uk doctor using centrifuge machine
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manufacturing process automation control panel
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轉動於一個滾筒到一個滾筒
灰色头发成熟的专家向商业工作者解释财务图表
numbers jumping up and down on electronic multimeter
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