HG/T 20592  法兰盖 BL 50(B)-40 FFf s/S= a

BL50B-40FFf s/S= a

WN150-300RFh350b) FMRFn

WN450-25 FMF=10FRFFcm

WN 400(B)-25 RF

SO 450-150 RF0s250--f/00

WN 25-300 RJ S=3.5

bl20-2.5rf0-�F400 rfer4f

47021 FM600-1.0/601

WN80(B)-25M,0/32200/

SO 250(B)-6 RFs1F8FFF122Sch80=sFп�RF0@RF RF1655h40S.00