NB/T 47021  法兰 FF 900-0.25 خ´s=81pa

1 FF 900-0.25 خ´s=81pa

SO 10"-150 RF

3 FM 2400-1.6 δ0=16

WN 80 -300 RFrf768150T201.66)-16rf

PL100(B)-16 RF1680i0Ra@5@RF8F0

WN20B-16FFS316 RF0ch4000-

wn300-150 rf asm5ffm s=8S7c=9s=4 nb=60Sr0cr

WN RF 16K 200A S=3Sch800=402.5 RFB)=

WN65(B)-63RJ