directed water jet
定向水射流
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The paper introduces a fitting method between water jet and PDC bit tool, that is, aid bit tool cut rock while water jet is directed from suitable location of bottom of bit tool.
介绍了一种射流与PDC刀具的配合方式，即水射流位于刀具底部适当位置辅助刀具切割破碎岩石。
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