9 7 8 39 39 inch 251mm 3 wings step type blade bit with 3 1 2 39 39 API Reg pin thread

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To stop the motor running and stop supplying air to the impactor, send water, insert the fork into the drill rod groove of the holder, make the motor reverse the slide back, disconnect the joint from the drill rod, and then connect the second drill rod, press this to cycle and work continuously. characteristic of down the hole drilling rig. 1.

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Dth drill bits are the most used drill tools no matter for construction or mining industry, especially for the mining industry, we can say the dth drill bit is the foundation for the mining drilling working.

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