GB/T 12459  同心异径管 DN 50×25-6RC�u0083/public/data/src

WN80(B)-160FM S=8RF b3 d=78 â0.6B)-25 RF S

SW 8"-300 RF40S6 K=150 RFĮ93f0 S=6F0-4.0Sh/F-300rf.5F40 rfvok1516=

DN200-PN160 WN F Ⅱ S= S=23

B WN56"-150 RF S=6RRRRR4 f1=1F6

WN 2"-300 RF Sch40S6 K=150 RFĮ93f0 S=6F0-4.0Sh/F-300rf.5