bit port
... bit performance 钻头工作情况 bit pilot 钻头导向器 bit port 钻头水眼 ...
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... bit type 钻头类型 bit jets 钻头水眼 bit nozzle 钻头喷嘴 ...
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钻头水眼总流量面积 total flow area
下水眼钻头 bit with extended nozzles
·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
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.
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