NB/T 47021  法兰 FM 500-1.0S=78c=10d=f1=S0-RJ50 �-10F2C-RF10RF=74 H=1

1-FM 500-1.0/S=78c=10d=f1=S0-RJ50 �-10F2C-RF10RF=74 H=1

WN 46"-150 RF Sch80SC=57 H=900 SFM Sch10SRF

wn350-300rf 20615-2/mpa

wn25(a)-900rjrf1F SIot70-

WN80(B)-150 RF70017F-)-6F16RFF 20FF16 rf hg/

SO 1/2"-150 RF=28 L3001F

WN500(B)-25 RFa=89