GB/T 12459  同心异径管 DN 580×15-Sch20RC02

DN 580×15-Sch20 RC02

WN 50-150 RF S=842110

wn80-600rf rj8e/u0ir/40 RF RF=

3 FM 900-1.0 δ0=10 δ=74rfScF RFFF0

BL 200-150 RF=8 h=24-62950 RF0-4.0M10bb=38/ FF S=0T3F8-f/@4

BⅠ 1600F00-

pl15(b)-10ff k=7-0.6Ã

wn40-100rf

BII25000 RF=1â20-δhC/-27F-2