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Axial-flow type cut-off valve
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connecting structure of butterfly plate and valve rod
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Ball valve elastic element cavity dustproof construction
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Ball valve spheroid arc incision processing equipment
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Soft sealing butterfly valve with triangular ring structure
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butterfly valve soft seal valve seat structure
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A kind of quick-detachable check-valves
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A kind of shut-off valve being easily installed
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Built-in double-flap check valve
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Half cun of metal sealing floating ball valve
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