pearl corundum
... pearl blister 贝附珍珠水泡珍珠 pearl corundum 珍珠刚玉 pearl grain 珍珠格令 ...
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本文介绍了天然金刚石、天然刚玉、石榴石、石英、燧石、浮岩、硅藻土、赤铁矿、珍珠岩等天然磨料的性能特点和其应用。
This paper discusses the performance and application of natural abrasive such as diamond, corundum, garnet, quartz, flint, pumice, diatomite, hematite and perlite.
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