GB/T 12459  同心异径管 DN 80×32-7RC ScFR671@°F5@PM0 BL25 RF��&ampa5 d=2n400-600

DN 32×80-I-7 RC ScFR671@°F5@PM0 BL25 RF��&ampa5 d=2n400-600

WN 200(B)-63 FM S=4 RFFS

PL500(B)-10FF b=8

WN20(A)-63RF D

B WN 10"-2500 LT LFM S=8

SO 25-10 RF2L56-HR

BL 5"-400 RFFml80mpamnbs0RF SF RF0F S-10S40SoWNFRⅡa

so250(b)-10r