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A kind of basket type top drive drilling unit head
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A kind of bent axle and gear connection structure and attaching method thereof
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A kind of monoblock type plate valve valve group
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A kind of crosshead and piston rod attachment structure and processing method thereof
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Symmetrically-arranged closed gear transmission system
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Top drive type core drill power head guiding device
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Movable type water inlet valve limiting plate
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Top-drive type core drill
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Gear-shifting gear fixing device
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Drill pipe slip structure capable of retreating
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Split type cross head sliding shoe structure of slime pump
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Top drive type core drill displacement compensation device
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Slurry pump control device and control method thereof
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Top-drive integrated core drill power head
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Automatic guide rope tensioning device for top drive type core driller
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Drill rod clamping device
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Integral ball valve guide sleeve and machining method thereof
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