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craftsman making leather wallet

两名学童在做工程项目的近距离拍摄

electrical tester

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學生在學校做工程項目

digital multimeter in a tool box. close up

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一個聰明的女生正在做一個教育項目

vertical video of male film sound recordist wearing headphones checking equipment shooting movie or video in studio

在飛行模擬器駕駛<unk>中拉動<unk>杆的手

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一个可爱的白人男孩在木制飞机玩具上玩耍,并在木工车间做自拍

motion along multimeter with probes on white surface

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person using a mixing desk

兩個年輕的同學一起在工程學上做項目

close-up of the device of a working electrician checking the presence of voltage in the network

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白人孩子在电路板套件中测量电流

vertical shot of student soldering circuit board

沿著實驗室台和設備進行追蹤

multimeter with connected probes on clean white background

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調節實驗室電池電源的電壓

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兩個年輕的同學一起做學校項目

male hand setting sports timer

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校友用<unk>子压紧锡<unk>线的近距离拍摄

man using a multimeter to measure the voltage of the batteries

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numbers jumping up and down on electronic multimeter

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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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craftsman sewing wallet

電氣測試器 diy 電工工具

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操作测量设备的人员在测量实验室中

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electronic equipment repair shop. the engineer technician solders the printed circuit board of an electronic device under a microscope.

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electronic equipment repair shop. the engineer technician solders the printed circuit board of an electronic device under a microscope.

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electrician student checking voltage and amps with multimeter

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engineer hand experimenting with electronic components on breadboard

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male hand setting sports timer in slow motion

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increasing low frequency sound gain on mixing console, macro close up

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microelectronic engineering microcontroller led

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引導時間 38 分鐘

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戴眼鏡的聰明男孩用鐵和<unk>子<unk>接線

學生坐在桌子上做學校項目

lcd screen of shock resistant and water resistant digital sports watch with chronograph

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兩個聰明孩子坐在辦公桌旁做項目工作

young man practising with the guitar

man measuring the voltage from a wall socket with a digital multimeter

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兩個孩子在做工程課題的近距離拍攝

turn on the beautiful vintage hi fi amplifier

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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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vertical 4k, time counter and spinning audio tape on professional reel to reel recorder player

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car repair toolbox beautiful aligned in a green garage shop

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擴大器的水平在每一個節奏上下 - - 靠近

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a man setting up audio equipment in a studio

closeup of finger operating a switch, a knob and manipulating a highly sophisticated electronic vintage device

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引導時間 40 分鐘

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