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· A Uniformly polished area is usually attained with much less deep scratches when compared with grindstones with shaft. Styrene Butadiene Rubber is among the most used rubber and accounts for 45% of all rubber produced. SBR can be a family of copolymers created by polymerising styrene and butadiene. SBR https://beediadiamond.com/catalog/rubber-points
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