GB/T 12459  弯头 DN 80-290ELfS 90EL

DN 80-2 90ELfS 90EL

bl100(B)-16 fF

PL 450(B)-16 RF b

LJ 3/4"-150 RJ10Sc RJ0�.680@40@S0 FF HG

WN100-150 RF Sch1577.5

pl100(b)-16ff bb

bl25-900fm1.522 Ff H

WN RF 20K 450A Sch40S

法兰 wn50(b)-16 rf,s=6R0plG/T20592-2009n=b=rf s=��

WN50B-16RF