HG/T 20592  法兰 WN 80(B)-40 RF s=6S=13-12

Wn80b-40 rf s=6S=13-12

WN250(B)-40GTs=/MB)1-10RFRFh16040 RF50f�12/u=0

2 FF 300-1.620δ1=20

BL250-150RF30016S rf s0F T RF Sch400S

WN 4"-150 RF Sch20Sh40 B=241.560-

WN 20(B)-16 RF S=5h160h1005150RF SCRF D

BL 50-300 RF6 TSch40S206=920d=m b/0

PL50