Yinglong Superhard Material Factory
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My company has some gems should to be polished, could you give me some advice or recommendations about what kind of grinding-wheel or paste is the best
(2009-2-13 11:05:57)
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Yinglong Superhard Material Factory
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My company has some gems should to be polished, could you give me some advice or recommendations about what kind of grinding-wheel or paste is the best (2009-2-13 11:05:57)