HG/T 20592  法兰 WN 80-63 RFss b=3 AA=970S=50

wn80-63rfss b=3 AA=970S=50

SO 50-40 G B=59HG

WN 40(B)-100 RF S=4616rf/u008CH40=12S=7 M

bl250(a)-10RF=70 h=1650 RFs=4FS=

PL 50(B)-16 FF D=150 K=120.7 b=1

WN150-63RFCH8)86F16.25R-16 RF0 rj6RF=81

PL40B-16Rf716 rf-=

WN50-900RF A=6R50S Damp H/u

2 A5-5M5