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9 1 2in Threaded Button Bits

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9 1 2in threaded button bits

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9 1/2in Threaded Button Bits Roller Bearing 7 Nozzle Oil Well Drill Head

9 1/2 Inch 5 Blades Carbide Insert Drill Bits Oil Well Drilling Bit 1. Rolling seal bearing structure, the cylindrical roller cone is in the groove, which increases the journal size. 2. Thrust bearing pairs are surface-treated and hardened respectively. 3.......

Shaanxi Hainaisen Petroleum Technology Co.,Ltd

Address: 27-2103, Yu Fu Guan Lan Chan-Ba Ecological District, Xi'an, China

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