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钻斗
回转切削孔底岩土并能携带岩屑至孔外的筒状钻孔工具。
来源:《冶金工业建设钻探技术规范 GB50734-2012》
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Archiver|手机版|小黑屋|牛马Next ( 苏ICP备17047105号-6 )Published by Stonespider

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