HG/T 20592  法兰盖 BL 500-63 RF�150

bl500-63RF�150

so80-300rf b

DN 200-Sch40S TS

SP-5

IF 200-16 T3550 RF300RF B=52 s=5=-166rf3ch25 wf90 rfƒ5 RJ Sc/G/ch��c 260kf5 RJ Sch/RF@�

wn65(b)-25 m s=4F

PL50(A)-6 RF C=146r

LP-1RF S=15RF Sch160-10RF-2040

BI 210 rf0okeR δ1=8

TPB-2 RF Sch4