GB/T 12459  弯头 DN 12-Ⅱ-390EL0F2010HG20rf.45f-

DN 12-Ⅱ-3 90EL0F2010HG20rf.45f-

wn20-1500fm28 HG/T20615b=0.1B56RF40RF4

20623bWN700-150RF00592-500-1.0909t‚F

wn50(b)-40 ff s=40409

SO 150(B)-16 RFop-2 RFRF0/

WN125-40 RF,S8©�F-1p

47023 FM400-4.042/110-16 RF00

bl350-300t0m0°pl

WN250(B)-6RF R)