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ROADWAY ACCESS HOLE DRILL AND A METHOD OF MICROTRENCHING USING THE DRILL TO OPEN AN ACCESS HOLE IN THE ROADWAY
ROADWAY ACCESS HOLE DRILL AND A METHOD OF MICROTRENCHING USING THE DRILL TO OPEN AN ACCESS HOLE IN THE ROADWAY
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机译:巷道进入孔钻头和使用钻头在巷道中打开进入孔的微管状方法
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摘要
A method of cutting a microtrech in which the buried utility is exposed by opening an access hole in a roadway above the buried utility using a roadway access hole drill that rotates and vibrates the drill bit. A roadway access hole drill having a down-the-hole jack-hammer drill bit and a motor to rotate the down-the-hole jack-hammer drill.
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