HG/T 20592  法兰盖 BL 450-6 RF=6nbLWN1

bl450-6rf=6nbLWN1

wn500(b)-16 rf s=72005-4

wn20-600rfs==100 b=3.50-300

wn100-16 RF S=3.5

WN80(B)-100 RFF50(a

wn600-1500rj s/ww.hgp35 bb=3/ mRf2RF�p4-

WN 2"-150 RF Sch80Sf100-1SH=73NRSSS=

wn250(B)-16FMS=8.630B)ch4 B0/6

wn200(b)-25ms=66 RF/u00c2