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Cleanout fluid cleaning method for petroleum pipeline
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Simple and convenient cleaning method for petroleum pipeline
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Drill pipe inner wall descaling brush head
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Petroleum drill pipe outer wall rust removal device
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Labeling device for labeling machining position of petroleum pipeline
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Petroleum pipeline lifting marking device convenient to move
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Labeling device used for machining petroleum pipeline
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Annular workpiece polishing mechanism
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Tool for detaching built-in part
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Roller inclination adjusting structure
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Stirring mechanism for polishing solution
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Movable sandblasting grinding structure
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Device for detaching built-in part
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Damping base
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CN103817738A
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Waste material collecting structure
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Movable base for electromagnetic valve frequency meter
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CN103818710A
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Mechanism for discharging in limiting way
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