1.Downhole drilling machine: When drilling a downhole gun hole with a aperture less than 150 mm, in addition to the application of a rock drill, it can also be used to drill a small diameter of 80 ~ 150 mm. When drilling a gun hole with a diameter of less than 70 mm in coal or softer mineral rock, it is generally used to drill or air drill, driven by a motor (or air motor) to drill the drill pipe, and the rock (coal) chips drilled out are discharged through the spiral groove on the drill pipe.
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The corresponding angle of twist is read off a calibrated scale on the wrench The corresponding angle of twist is read off a calibrated scale on the wrench
Its open design facilitates air circulation and sunlight penetration while providing secure containment Its open design facilitates air circulation and sunlight penetration while providing secure containment
Standard rolls are usually 50 feet or 100 feet long and 50 inches wide, but custom sizes are available at varying prices Standard rolls are usually 50 feet or 100 feet long and 50 inches wide, but custom sizes are available at varying prices
They not only enhance the exterior aesthetics but also provide shade and solar control, reducing heat gain and glare They not only enhance the exterior aesthetics but also provide shade and solar control, reducing heat gain and glare