A top drive is a mechanical device on a that provides clockwise torque to the to drill a . It is an alternative to the and . It is located at the place below the traveling block and moves vertically up and down the derrick. [pdf]
A rotary-screw compressor is a type of , such as an , that uses a rotary-type positive-displacement mechanism. These compressors are common in industrial applications and replace more traditional where larger volumes of compressed gas are needed, e.g. for large refrigeration cycles such as , or for compressed air systems to operate air-driven tools such as and . For smaller rotor sizes th. [pdf]
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Exploration diamond drilling differs from other geological drilling (such as ) in that a solid core is extracted from depth, for examination on the surface. The key technology of the diamond drill is the actual diamond bit itself. It is composed of industrial diamonds set into a soft metallic matrix. As shown in the figure, the diamonds are scattered throughout the mat. [pdf]
Screw-type air compressor structure of a unique design, a compact, stylish appearance, high efficiency, small energy consumption, low noise characteristics and long life, is a smart environment-friendly pro. [pdf]
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