HG/T 20592  法兰 WN 300(B)-16 RF S=3

WN 300(B)-16 RF S=3

WN20(A)-16RFTS)-10sch60 R

WN 400-150 RF S=���a)-1

WN 8"-600 RF S S0-15 δ=60 hF16�015H c0@47

WN125(B)-63 M6 rf9 BL10-16 RF(b)-1

wn15b-16 rf

SP-6-20-3m0m0R-4=100SBL1

wn80(b)-16 rf s=700 R/h400-

wn100-150rfFRF SCh40