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孔睿机械
KR Drilling Machinery
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Terminal Joint
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Kelly box /Kelly stub
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Slew Bearing
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Swivel Joint
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Rotary Sleeve / KDK
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Rotary/KDK Plate
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Sliding plate
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Upper Section
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Extention Bar
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Transfer Kelly box /Kelly stub
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Spring/Disc Spring
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Water Plate
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Kelly Guide
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Steel Rope
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Pulley
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Gear
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Rubber
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Oil Seal
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Strengthen Ring
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