HG/T 20592  法兰 WN 40-100 RF=72ⅡF6RF5RF

wn40-100 RF=72ⅡF6RF5RF

WN 18"-300 RF Sc5

LWN20-600RF B=20

WN25-150 RF Sch20

so 40-300 rf sch40sF Sch40ke1rfF/

PJ/SE50(b)-10 RF0h4

LWN 2"-600 RF B=50

SO 20-300 RF0.5/40-105R

pl20(a)-10RFR

pl20(B)-10 M51fm s=60/6mpamu00c2\u00b0 pl2RF SmeT20