HG/T 20592  法兰 WN 500-63 RF S=

WN500(A)-63 RF S=

DN600-Class150 WN RF S=16

BL450-25 MF b=30

BL 2"-2500 RJampampampampampampampquothg2

SO 20 -150RFS4.0=FRFampF Sch10 dRF@A0 RJ

WN250-16 RFS9niS5FF

SO20-300RFSCH100908/ja4/u0

WN25B-16M S=450RFFa

SO 150(A)-25 RFh10S R0 R

SO 6&quo