Set up a slant water hole at reamer, and connect the reamer and pilot with reducing synergy flute, which strengthen the cooling and washing function and ensure the bit's effects.

在扩眼体设一斜水眼，在导眼体与扩眼体之间连接一缩径增效排屑环，强化了冷却清洗作用，从而保证钻头有较好的使用效果。

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The multiple-function pump test-bed can not only test pump's inner and outer performance, but also carry out to test water turbine and small type of water hole.

多功能水泵综合试验台不仅可以进行水泵的内外特性试验，而且还可以进行水轮机试验和小水洞试验。

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Using full vector orthogonal function model of the auxiliary air hole pattern of cut-off characteristics of optical fiber were discussed.

利用全矢量正交函数模型对空气孔辅助光纤的模式截止特性进行了讨论。

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