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CN106481283A
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A kind of pressure release type petroleum pipeline deferent box cupling structure
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CN106401495A
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Petroleum pipeline nipple assembly
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CN106423549A
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Electromagnetic petroleum tubing pup joint
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CN106639909A
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Anti-thread-gluing sealing connecting pipe joint
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CN106641508A
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Split type petroleum pipe short section
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CN106639903A
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Pipe nipple assembly of thermal compensation petroleum pipeline
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CN106481287A
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A kind of antitorque pipe joint of high sealing
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CN106439304A
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Oil pipe hoop convenient to mount
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CN106641500A
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Coupling for preventing oil leakage
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CN106437663A
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Anti-erosion petroleum pipeline pipe nipple assembly
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CN106481288A
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A kind of antitorque sealed fitting
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CN106437549A
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Petroleum pipe coupling special for preventing surface damage
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CN106401497A
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Friction-reduction special oil pipe coupling
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CN106437623A
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Short tube section assembly applied to lubricating grease paraffin preventing and scale preventing oil extracting tubular column
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CN106704736A
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Disengagement-preventing coupling used for petroleum pipeline
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CN106437548A
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Petroleum pipe short section
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CN106439295A
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Heat-preservation nipple for oil pipe
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CN106703712A
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Seal connecting pipe joint
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CN106401496A
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Special oil pipe coupling with stress releasing function
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CN106439285A
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Anti-gluing sealed pipe joint
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