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chlorine, Hazardous chemicals and symbols on containers, chemical in industry or laboratory
potassium hydroxide and symbol structural formula chemical on the blackboard
Flammable Symbols of chemicals in glass, chemicals in the laboratory or industry
Synthetic oil in bottle ,sample oil in the laboratory and industry
Hydrofluoric acid, Hazardous chemicals and symbols on containers, chemical in industry or laboratory
Acetic acid in glass, chemical in the laboratory and industry
Closer look of the positive test samples of Covid-19 or coronavirus inside the laboratory with the hazard sign

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1082107193
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素材 影片 編號: 1082107193

ethyl alcohol in test tube, a chemical used in laboratories or industry and flammable

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  • 0:06

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chemical industrychemical industry

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