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drill rigs are formulated. Scientificbases that can be used for design of this equipment are formulated.Keywords: top-drive system, effective power, loading, efficiency.In 2001, the

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head and use the rotational capability of the top drive to remotely couple the two joints of Initially, the process of handling or running casing is not very different from running drill pi

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drive, top-drive head rotation, feeding and hoisting are all done by ration pump and ratio High efficiency small portable hydraulic core drilling rig is applicable for high-way and bu

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Chester, Pennsylvania USA manufactures land based portable top

Schramm, Inc. based in West Chester, Pennsylvania USA manufactures land based portable top head drive hydraulic drilling rigs for oil & gas, CBM, mineral exploration, blast

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Drywall Screw with Drill Point 1.Material:C1022A2.Diameter:3.5mm-4.8mm3.Length:16m-152mm4.Head:Bugle Head5.Drive:philip drive6.Point:drilling point7.Surface Treatment:

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top-drive power head drill --cnki

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China FKW-12 Speed Fluid Drive Top-head Large-torque Easily

drill body, equipped with wheeled structure, easy moving. 3 Speed fluid drive top-head, l the top-head stroke is 3.3 meters, high efficiency. 4 Equipped with holder and unscrewe