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High temperature valve seat village sleeve production process-invention patent certificate
National quality inspection qualified and assured products
High temperature valve seat-utility model patent certificate
National quality inspection qualified and assured products
High temperature valve seat bushing processing system-utility model patent certificate
High temperature valve seat village sleeve production process-invention patent certificate
Pre-forming device of high temperature valve seat bushing-invention patent certificate
Pre-forming device for high temperature valve seat bushing-utility model patent certificate
High temperature valve seat bushing molding die assembly-utility model patent certificate
High temperature butterfly valve seat (PTEE+EPDM)-Appearance design patent certificate
High temperature valve seat bushing side hole processing device-utility model patent certificate
High temperature valve seat bushing side hole processing device-invention patent certificate
Valve Seat (KV88)-Appearance Design Patent Certificate