冲击回转钻探,冲击回转钻探,chongji huizhuanzuantan,钻探,回转,冲击,huizhuanzuantan,chongji,[拼音]:chongji huizhuanzuantan[外文]:percussive-rotary drilling用冲击和回转两种方式同时破碎岩石的钻探方法。这种方法是在回转的钻杆柱下端和取心钻...