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Dth drilling tool ql50 down the hole dth drill bits 105-130mm diameter black 2 inch dth drill bits , down the hole hammer bits for shank br2 api 2 3/8'' thread blue color 165mm 3 wings drag bits for water well drilling

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Dth drilling a down-the-hole drill, usually called dth is mainly a pneumatic powered rock or ground drill, in which the percussive hammer is located directly behind the drill bit, so the percussion mechanism follows the bit down into the drill hole. the drill pipes transmit the necessary feed force and rotation to the dth hammer […]

Dth drill bit, drilling tool, drill bit manufacturer / supplier in china, offering hjg high performance 6 inch rock drill dth hammer, cemented carbide for mining, crawler hydraulic well-geothermal drilling rig hjg-w828a and so on.

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