HG/T 20623  法兰 WN 1200(B)-150 RF B=1182

WN1200(B)-150 RF B=1182

SO50(B)-16 RFrfrgA)-615 WN

bii 5800 h=300 �b)-150-1pam2156-RF S=

WN750-150 RF Scrf°wn350G

WN250(B)-40RF S=851717 fm

47021 fm 600-1.6RF S=1

pl25(b)-16ff b=3 bb=32.524.3 S=3.1 H1=9 H=76 H=

bn/@LWN100-150 RF S=8F‰/

bl500