HG/T 20592  法兰 PL 250(B)-6 RF b=4mo2RF Sch160.

pl250(b)-6RF b=4mo2RF Sch160.

2 FM 500-2.5tm10RF-300 RF B=586 C=72 H

wn 20-2500rj0mfm5 dS=4 A=81B1Fuotmp

wn 40-300 rf)-63

wn40-600rj h1=1=6100 rfmpampampampampampam

47022 RF 700-1.

PL 400(B)-10FF C=29 B=250

so300(B)-16m1=RF SCF3.3860 RJ S=4F H d

so15