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Keying signal generator of hand valve
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Four-way sealing pipe connector
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Spherical pipe connector
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Processing method of valve seat sealing structure of ball valve
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Gate valve holder structure
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Gate valve structure
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Horizontally-moved tensioning-clamping device for pipe stopper
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Rotation type tensioning-clamping device for pipe stopper
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Valve used for gas PE (Poly Ethylene) pipe
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Moveable guide plate structure for gate valve
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Low torsion moment ball valve for fuel gas vertical pipe
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