GB/T 12459  弯头 DN 250-Ⅱ-1290EL ÃŽ

DN 250-Ⅱ-12 90EL ÃŽ

bl50-150 rf l=3/ rfF0-1.0/.-SRF S/ rf6/-16r

WN 150-300 RFg=h40-12/F6F

wn 450-16 RF

5 FF 1700-1.020δ0=62S=/0-100 rf

SO500(B)-10RF20Fãfm10h80s0RF220RF6 RF.6.0/0

WN25(B)-300RF

pl600(a)-2.5ff38.1066/Sm0)-FCL5 RF SF50

WN 20-150