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CN105952995A
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Self-cleaning connection flange for petroleum pipeline
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CN105923532A
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Oil pipe hoisting device
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CN105948169A
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Petroleum oil-water separation equipment
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CN105927798A
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Embedded petroleum pipe support device
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CN105927813A
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Energy storage heating type petroleum pipeline
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CN105952996A
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Underwater connecting flange for petroleum pipelines
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CN105952973A
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Spiral screw-in type petroleum pipeline support
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CN105972436A
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Petroleum heating device
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CN106140740A
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A kind of oil pipe outer tube wall descaling machine
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CN105927824A
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Solar heating petroleum pipeline
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CN105972369A
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Device for heating petroleum and assisting in flowing of petroleum in pipeline
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CN106085505A
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A kind of Petroleum corrosion inhibitor with defoaming function
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CN105907435A
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Efficient and energy-saving purification device for liquefied petroleum gas
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CN105910928A
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All-directional monitor for large petroleum machinery parts
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CN105921784A
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Automatic feeding drilling device for valve production
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CN105971587A
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Orientation pup joint probe for oil exploration
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CN105971562A
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Walking-beam pumping unit
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CN106091348A
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A kind of nonpetroleum heater
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CN105954501A
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Multifunctional oil quality detector
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CN105971533A
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Power tongs for petroleum machinery drill rod
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