CN105149393A
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Novel pipe wall ribbing device
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CN105158075A
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Negative pressure testing apparatus for steel pipe
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CN105149468A
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Full-automatic pipe wall ribbing device
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CN105149830A
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Short pipe flange welding device
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CN105149857A
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Long pipe welding device
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CN103438283A
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Novel gas drainage pipe
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CN103438284A
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Reinforced gas drainage pipe
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CN103438285A
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Improved polypropylene pipe
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CN103438297A
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Improved gas drainage pipe
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CN103016897A
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Novel blind plate
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CN103016884A
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Novel pipeline connecting piece
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CN103016880A
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Novel tee joint
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CN102601972A
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Oil cooling device of extruder for ultra-high molecular weight polyethylene pipes
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CN102680314A
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Testing device for hydrostatic test of plastic pipeline
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