HG/T 20592  法兰盖 BL 150-63 RF=82 h=175M S=6.

BL150-63RF=82 h=175M S=6.

bL100-63RF═п├п╡8 H5ch2M δ=60-

DN 250-8 TS/pђ–Т¬Ј��0S58 H5ch2M δ=60-

wn65-2500rj615 06Cr1=155h4

pl500-25Fm60R402m�wn65-25 rf046256R400F0 RF Sch8052=ler4�da

bl300-300 rf c=10

wn 300b)-25rfS=188FS

wn