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China 60.3 mm drill pipe catalog of friction welding drill pipe 2 3/8" g grade with api 5dp, friction welding drill pipe/drill rod 2 3/8" with api 5dp provided by china manufacturerhebei shitan machinery manufacturing co., ltd., page1.

115mm mission 40 well drilling dth hammer button drill bit down the hole (dth) hammer bits dth hammer bits roschen hammer bits or dth button bits range in size from 2" hole diameter upwards (50.1mm) to 36 (914...

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