HG/T 20592  法兰 WN 500(B)-25 RF

жі•е…°wn500(b)-25 rf

bl65-6m�° pl500(b)-25 rf.5rf6

SO50(B)-6 M58M00FFch140 rf RF â…،00 RF Sch80/@ï؟½ï�

PL80A-10 RF b=3u00a40Sh8δ

so40(B)-25m45F14 S=/-4

JWN40*80-150RF B=40.3

WN 50(A)-16 RF S=S=3

SO 50-150 RF160 h=N400-600

WN250-