Factory Supply Directy 17 1/2inch IADC537 Tricone Rock Bit
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...tooth and tungsten carbide insert, in sizes from 37/8" to 36", for use in all formations, with any bearing: seal type / air type , tricone bits apply to oil gas geothermy mining water HDD and foundation industry. Main ......
Cang Zhou Creator Drill Equipment Scinence And Technology Co.,LTD
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