HG/T 20592  法兰 PL 50(B)-16 FF Sj0 b1=F5d=15 S=1=6C=20 L=230p/

pl50(b)-16fF Sj0 b1=F5d=15 S=1=6C=20 L=230p/

wn100(b)-100 m s=1(B)-Rh4b3003=b=4000-0007(B)-

WN 500(B)-40 RF S=500c=6350

WN600B)-10RF00S=Fam406(B)-25 RF S=10 Sch20=8S=100

A140054-258=6 B100(B)-25RF0hg/)-10 rf d=110=2165

BI 2300S=3.50RFB=J)-150RF+s=3.5