HG/T 20592  法兰 SO 50(B)-25 FM b=3-1=5

so50(b)-25fm b=3-1=5

WN 1200(B)-10 RF S=8 c=32 bb=

wn80-300 rf b=25f b=425RF15004150u0f/35rfSchF

Wn40b)-160Fm s50 RF0rfHRF-5 h=6ampampa scj MF8FF100 s=25-Sch160

PL 20(B)-25 RF´1=130RF S=12Sch40 H0h400-6f150RFb40-0.-2009)-

WN 50(B)-63 RF S=109S=3.2F