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Surface Mounted Diamond Drill Bits: work efficiency. According to the different hardness of rock layers, the matrix hardness is divided into heights of 30 ° -40 °, conventional depths of 15 ° -25 °, and low depths of 5 ° -15 °, which ...

Permeability Rock Geotechnical Lugeon Test Equipment: tightened, the packers are inflated and water is then pumped through the tighthead down the rods, through the packers and into the formation. ModelOD (mm)Expansion of scope (mm)Hole dia. (mm)Working ...

Coal Seam Gas Drainage and Sealing Device: Working pressure : 1 MPa - 6 MPa. · Safety value opening pressure : 0.4 MPa - 0.5 MPa. · Working flow : it can inject water 5 t - 8 t per hour, and the gas drainage volume depends on the ...

Water Injection Hole Packer: workers' sense of safety. · Breaking coal with water injection hole packer can prevent the explosion of coal and gas effectively. The details of water injection hole packer: · Structure: water ...

Cement Grouting Packer: Working pressure 1-8MPa (can be processed according to user requirements) Working flow: 3-4.5 tons per hour Hole sealing depth 1-8000m SIZE I.D(mm) O.D(mm) Expansion ...

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Surface Mounted Diamond Drill Bits