HG/T 20592  法兰盖 BL 80-40 RF-2=195 T S=3δ0=1 s

bl80(a)-40rf-2=195 T S=3δ0=1 s

SO 100-300 FMFM)5540-631okerservletM00rf00-1B)-100-0h0t50R RF S=10�=

WN 450-300 RF S=12=2290 aa= d= l= n= f1= S=658S

pl400-40mD=7-631okerservletM00rf00-1B)-100-0h0t50R RF S=10�=

WN 50(B)-16 RF00 RF00(B)-16 R