Diamond grinding wheels are widely used as grinding tools in manufacturing of hard and brittle materials, such as hard alloy, engineering ceramics, optical glass, semiconductor materials, and granite.
金刚石砂轮广泛用作硬质合金、工程陶瓷、光学玻璃、半导体材料、花岗岩等硬脆难加工材料的磨削工具。
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After a while, the old-bone tissue becomes brittle and fragile, like glass, because it's not as strong as the newer bone that would have formed without the drugs.