GB/T 12459  弯头 DN 400-1090E3D

DN 400-10 90E3D

PL500(B)-6RF

PL100(B)-6RF /u00e5/u00b8/u00a6/data/src

BI 1000n=4

wn500-150 tM595/RS=6 S

wn250-150 rf s=6mpampampampampnbspyun-25/202400

wn400(b)-25 rf0 RF60100m/

wn150(b)-40tb=- 6 RF B16-0.6hCH4rf hg00-=1300rf5 RF5-57/

wn 50-150 rf

so