英语词汇pilot boring怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	pilot boring
释义	pilot boring 简明释义预先钻进网络释义 1 ?预先钻进 ... 预张力锚杆：pretensioned bolt 预先钻进：pilot boring 预先注水：preliminary infusion ... 2 ?先行试钻 ... pilot bearing 导轴承，导向架 pilot boring 先行试钻 pilot burner 辅助燃烧器，辅助烧嘴 ... 短语 1 pilot boring bar 有导径的镗杆 2 raise-boring machine pilot drifting method 反井钻机导硐施工法双语例句 1 The only major difference is that boring jigs are normally fitted with a pilot bushing or bearing to support the outer end of the boring bar during the machining operation. 唯一最重要的差别是镗夹具一般用于控制衬套，或者在机器操作时支撑镗杆的外端。
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