HG/T 20592  法兰 SO 20(B)-10 RF.6-2.5/a=650-30=5.08H=450

so20b-10rf.6-2.5/a=650-30=5.08H=450

A WN 28"-150 RF B=S=16

WN 500-40RF=610 HG/T21633-19912 H=10/1 RRfbb=75

47023RF1100-1.01= RF 5

WN 500-150 RF S=806RFFM S00rf R680 B=600 K=

APA-2

wN65-300rf=3 d/0

WN 600-300 RFs204(b)-16 rfrfb1=90.

pl500b)-10rf