GB/T 12459  弯头 DN 350-1490ELm c)FR=1009 pl100(b)-1-1RF

DN 350-14 90ELm c)FR=1009 pl100(b)-1-1RF

WN40(B)-16 RF S=3

PL350(B)-10 RF-s=3.38M4/'10-/fsrf/5.00mf420m1805

47023 c-rf300-4FWRF S=ch40 sampampampquo

WN 25(B)-160 RF S=8

47023 fm1500-4.0 s=122

PL250(B)-6 RF41G0025038J S.25-150

WN80-16RF,Scej0SuF

LWN 4