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About หัวเจียรหุ้มยาง

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The English chemist Joseph Priestley gave it the title rubber in 1770 when he uncovered it could be utilized to rub out pencil marks. Its important professional success came only following the vulcanization system was invented by Charles Goodyear in 1839. This provides CR comparatively excellent weathering and heat resistance, https://beediadiamond.com/catalog/rubber-points

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