HG/T 20615  法兰盖 BL 20-150 RF rf592δ0-

BL20-150 RF rf592δ0-

wn450-10 rf sch40/00(A

DN400-Class600 WN RJ S=28 Sch8

SO 50-150 RFSch1M63 GLGRF6 SG00 SG SGh40S0 SGG-150 ST�c@RF�Sadm

WN25A-25 M S=3

3 FM 1100-1.0 δ0=5

BL 350-63 RJch1C-RF1000-1

WN 150-150 RF10=12- RFF2

WN150-150 RF Sch406r