HG/T 20592  法兰 WN 50-16 RF d=200 k=160 r=5

wn50-16rf d=200 k=160 r=5

WN150-300 RF Sch80=89 H=52 f1= B= D= b=B)-lSjF0@RF6�F0-3/u00aFS5

wn250-150 rf s=13C=18 K=60�

WN250(B)-25 M S=8 20b)-10rf-pampampampampampam25 FM RF6 F

BI 219 h=250RF S=6F S=406.F7气T6rf

WN 500-300RF SCH40sδ6 RFL=23 d)