HG/T 20592  法兰 SO 500-16 RF-B=п

SO500-16 RF-B=п

wn600-600 rf b=5S3FMRJ Sch80H4090RF Sch40=

IF 40-25 RFfm-12F00-

WN1000-150 RF B.400-300 RFnbsp60

WN 400-300 RF Sch40040M61.611fRFRF

DN25-PN10 PL RF Ⅱ71e2

WN20(B)-40M S=3.5b=110 c

DN250-Class150 BL RF)=146/F

IF 40-900 RF-60680 WN300