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New Step By Step Map For หัวเจียรยาง

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The English Chemist Joseph Priestley gave it the identify rubber in 1770 when he uncovered it could be used to rub out pencil marks. Its major commercial achievements came only once the vulcanization course of action was invented by Charles Goodyear in 1839. Drastically lowers the time it's going to Successfully Submitted (Awaiting Approval)
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