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| navigate by keyword : analysis and background blurred bunsen burn burner chemical chemist chemistry class combustion danger education endothermal equipment experiment fire flame for fuel gas health heat heati heating hot lab laboratory medical propane reaction reactions research risk school science scientific single sterilisation students test used |
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| Bunsen burner used for endothermal reactions.Laboratory bunsen burner,single gas flame used for sterilisation,combustion and heating.Gas flame in laboratory.Students in class blurred in background |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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