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Hebei Yichuan Drilling Equipment Manufacturing Co., Ltd

Province/State:hebei

Country/Region:china

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High Penetration Single Cone Drill Bit 8 1/2 Inch CE Certification

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8 1/2inch single cone bit cone cutters tricone plam bit CE certification Commodity Size IADC color WOB (Weight On Bit) RPM Formation 8 1/2inch 215.9mm ...

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what is a hss drill bit 90 mm core drill bit 70 mm core drill bit

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