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หัวเจียรหุ้มยาง Fundamentals Explained

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· A uniformly polished area is often attained with fewer deep scratches compared to grindstones with shaft. This offers CR rather superior weathering and heat resistance, especially for a polymer which includes double bonds in its chains. The chlorine also gives the material a degree of fire security which makes https://beediadiamond.com/catalog/rubber-points

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