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Roller Drill Bits 25Crmo Core Barrel Drilling For Construction Machinery Parts

Tianjin jinyiyuan Heavy Machinery Manufacturing Co., Ltd
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Roller Drill Bits 25Crmo Core Barrel Drilling For Construction Machinery Parts

Roller Drill Bits 25Crmo Core Barrel Drilling For Construction Machinery Parts

Rock drill core barrel with bullet teeth: Drill tools Core barrel Core barrel with bullet teeth The cutting ring releases the internal stress of the rock together with the cone bit to drill effectivel...

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