HG/T 20592  法兰盖 BL 1400-6 FF4���5@bl00RF�=75 h540S.0 LF

BL1400-6FF4���5@bl00RF�=75 h540S.0 LF

pl80(b)-10ffb1=50/

A30000 RRF S=3.5056F

wn50-150 rf sch10 s=3.

BI 3300BB=221-6Rh30F

WN50(B)-150 RF 0 RFL40-

SW20-600 RF Sc130RJ RF

nb/t47023rf900-2.5

WN 1000-150 RF0rb)20-F05rfS=3F0-10 d=68150 RF.0

3 FM65