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1200mm Diameter Double Layer Roller Bit Core Barrel

Tianjin jinyiyuan Heavy Machinery Manufacturing Co., Ltd
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1200mm Diameter Double Layer Roller Bit Core Barrel

1200mm Diameter Double Layer Roller Bit Core Barrel

Steel Double Layer Core Drill Barrel Harder Bedrock Formation Description It is difficult to drill directly with auger bits or rotary drill bits for relatively hard bedrock formations, large boulder ...

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