This rock chips easily.

这块石头表面容易剥落。

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The influence of jet position on rock chips formed ahead of bit was analyzed.

并对射流位置与刀具前方岩石碎块形成的关系进行了分析。

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The influence of jet position on rock chips formed ahead of bit was analyzed.

并对射流位置与刀具前方岩石碎块形成的关系进行了分析。

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