GB/T 12459  弯头 DN 25-590EL049D4.0

DN 25-5 90EL049D4.0

WN80-40 RF Sch40N0/bsp300-1.0 ã06RFAA/t

WN 200-150 RF Sch800 rf h.0

PL 500(B)-6 RFW00-0.6R0rfca

so50-150m80s404h.4-1.0

PL 700-40 M

NB/T47021 M600-1.02

LWN 80-150 FM Sch1405/682S.6mp

5M 800-4.0/-1.56=5.5/u7023.05gch300)R

hg/t2059