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Hejian Hengji Bit Manufacture Co., Ltd.
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Rotary Rock Bits
IADC 447 tungsten carbide insert bit for shale and salt formation
IADC 447 tungsten carbide insert bit for loose sands formation
IADC 515 tungsten carbide insert bit very soft formation
IADC 525 tungsten carbide insert bit very soft formation
IADC 517 tungsten carbide insert bit very soft formation
IADC 527 tungsten carbide insert bit very soft formation
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