HG/T 20592  法兰盖 BL 500-63 RF�150 RF Sch10S0S=6

bl500-63RF�150 RF Sch10S0S=6

LWN20-300 RF Sch160 H=38850

wn150-40 rf s=14/

HG/T20592-2009 WN15-16 RF

WN 28"-150 RJ Sch80D22

20592WN20-100rfS=4FRF100F S

WN15(B)-160RF6RF0 R-sch=sch

WN25-600 RF Sch1200-0.6 MRF800/58-11

WN25(B)-25MS=6d=2f5R

WN 45