GB/T 12459  偏心异径管 DN 50×10-Sch20RE

DN 50×10-Sch20 RE

wn400(b)-16 fm s=125/f180 D=310 K=260 C=3

wn200-25rf s=12.5 &ampampamp;amp

BL40-16RFRr0

WN350-300 T S=12S=6F0.25S=rf K=3355r

WN700(b)-16 RF1608amp-140F)RFrfs=7F=19rf D=

so50b)-300rf &a

WN 80(B)-63 RFca80S Sc

wn40-150fm s3

Bl 150