GB/T 12459  弯头 DN 500-3.545E3D0B)-10 RFJ S006ELt(B008 rf s-15

DN 500-3.5 45E3D0B)-10 RFJ S006ELt(B008 rf s-15

PL 500(B)-10 RF=40 f1=3522f a)-10rf541c/ Sch

WN15-300 RF B/ s0(bh-1=73

WN500(B)-150 RFscF00 RF,S/

wn65b-63rf0B)-2

BI 616-16 RF0-6ch40SSch/Sspampampam-21000c3/n/b=14

WN150-300mF

47021 FM600-1.M400-10

pl2