NB/T 47022  法兰 FF 450-0.6/20δ1=6/0S D=1675-3RF B=

2 FF 450-0.620δ1=6/0S D=1675-3RF B=

wn20b)-40fm RF0S 21/

so400(a)-16rj/R=150)-Ft-1.0/607FF B=306 A S.26

WN 300(B)-16 M S=10

SO 150(B)-40 RFF Ⅱs BL1000M450-1.0-��(B)-10 RFS=4r

PL 150-16 RF10=12009)-10 Rh30ch8015)RF

WN20B)-600RF100-300 RF-1

WN 3