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Earthquake-proof pipe connection coupling for easying joint and fix
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Up and down coupling for easying the joint and fix therof
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Coupling for connecting a branch pipe which can connect the branch pipe having the same diameter as that of a main pipe
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Coupling for branch pipe connection having an attribute of good airtight and convenient connection
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Coupling for connecting branch pipe in which the branch pipe connector is divided into two
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Method of pressing a reducing pipe
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Method of pressing a coupling for medium and large-sized pipe connection
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A pressed coupling for medium and large-sized pipe connection
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A pressed coupling for pipe connection
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WO0181811A1
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Nonferrous metal pipe coupling structure
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