類似のロイヤリティフリー動画
A lab assistant at the chemistry desk is using a variety of tools to check the quality of water before it goes on sale.
Hand in gloves stick water bottle. Close up of laboratory worker sticking sticker at bottle with transparent liquid. Laboratory research
4 in 1. Set of footages with scientist dripping purple liquid into test tube. Pouring the liquid into the tube from the pipette.
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