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About หัวเจียรหุ้มยาง

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The English chemist Joseph Priestley gave it the name rubber in 1770 when he uncovered it could be utilized to rub out pencil marks. Its key business accomplishment arrived only following the vulcanization method was invented by Charles Goodyear in 1839. · Because it is crystallized with GC and polycrystalline https://beediadiamond.com/catalog/rubber-points

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