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免費 Ph控制 視頻

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沿著實驗室台和設備進行追蹤
dialysis machine working in hospital-blood flow
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研究員身穿防護服,戴防護眼鏡的女性在綠色田野敲打玻璃
dental technician preparing for work
白人研究者近距离观看 穿着防护服和防护眼镜的男子坐在田野上采集小麦草
laboratory worker preparing experiment at lab
container with green liquid bubbling in a metal measuring flask
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female hand is clicking values on examination machine in laboratory
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白人研究人员穿着防护服,手持试管,在绿地进行害虫控制时使用笔记本电脑
白人研究者身穿防护服的男子在绿色田野中进行害虫控制时拿着试管和树枝
戴著防護套裝和眼鏡的科學家在實驗室工作,用植物樣本
saline solution dripping in a medical environment
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360 ml of a blue chemical cleaner are poured into a measuring cup
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空調遠程控制 螢幕 變化模式 樂趣 溫度
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白人研究員穿著防護服,拿著試管,在綠地進行害蟲控制時使用筆記型電腦
manufacturing process automation control panel
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chemical reaction demonstration using a magnetic stirrer
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saline drip gradually decreasing in volume
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color change in naoh solution using natural indicator
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白人研究員身穿白色外套和防護眼鏡的女性在綠色田野中觀看試管
incoming wires are attached to solar power controller, closeup view
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白人研究員穿著防護服的男子,在綠色田野中進行害蟲控制時,握著試管
白人研究員,戴著白色外套和護眼鏡的女性,在綠色田野中看試管
hands conducting a colorful chemical reaction experiment
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operation of a dropper in the hospital room next to the patient
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戴着橡胶手套的手显示 covid 检测阴性
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liquid vortex in a laboratory beaker
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白人研究員女士在綠色田野中進行害蟲控制時,戴著防護服拿著試管
白人研究員女士在綠色田野中進行害蟲控制時,戴著防護服拿著試管
vitamin c and iodine experiment
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研究人員在綠色田野中進行害蟲控制時<unk>坐和握著試管
orbital shaker for mixing, shaking, blending biological samples in glass flask
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pressure washer gun filling bucket with water and soap
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stock market candlestick chart animation over laboratory beakers with blue liquid
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taking body temperature with a non-contact thermometer
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白人研究人员穿着防护服, 拿着试管和树枝在绿地进行害虫控制
chemical solution being mixed by a machine for an experiment - tilt down, slow motion
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chemical reaction with starch, iodine, and vitamin c
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scientific research. chemist working at modern science lab. test tubes
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battery gauge displaying readings
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混合綠色奶油的近距離拍攝
measuring liquid in a transparent plastic measuring cup
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blue liquid in a flask
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白人研究員穿著防護服的男子,在綠色田野中進行害蟲控制時,握著試管
白人研究員在綠色田野中進行害蟲控制時,身穿防護服的男子拿著試管
smart water meter display showing volume of cubic liters used by residence
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研究人员的近距离视图 男人手拿着试管在绿色田野中进行害虫控制
demonstrating ph changes with butterfly pea flower
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male worker examining gin in measuring cylinder 4k
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