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A Simple Key For หัวเจียรยาง Unveiled

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The English Chemist Joseph Priestley gave it the identify rubber in 1770 when he observed it could be used to rub out pencil marks. Its major business accomplishment came only following the vulcanization procedure was invented by Charles Goodyear in 1839. This provides CR rather excellent weathering and heat resistance, https://beediadiamond.com/catalog/rubber-points
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