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หินเจียรยาง - An Overview

williamy582kqv2
· Has A higher standard of toughness than WA (white alundum), and While using the WA volume of hardness, it has fantastic form retention, so it's got a long dressing cycle, and generates very little warmth in the course of grinding. When compared with WA, it can be employed in https://beediadiamond.com/catalog/rubber-points
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