HG/T 20592  法兰 PL 25(B)-16 FF b=4=2.5 b=3-2Fb)-=000-16rf.0

PL25(B)-16FF b=4=2.5 b=3-2Fb)-=000-16rf.0

WN 150-300 RF8.4sport-log40150 W BB=00RF0 L01 C=18R496r0S144 p-150 RF

WN 500-25 RF S=12F B=77 H=18H4M9B6100-crea0gcra)

PL25(B)-16FF b=4=2.5 b=3-2Fb)-=000-16rf.05F.6c

WN10(B)-16 RF,am0h60062SS

WN100-16RF6=4 S