NB/T 47022  法兰 RF 2600-2.5/20δ1=62F0FB=2s=20δ1=

2 RF 2600-2.520δ1=62F0FB=2s=20δ1=

47021-fm300-1.6/50 f116

wn50-150rfrfm105 RF4

PL 65-16 RF f1=2.5 C=19 D=184 b=3

WN50-900FM1G00-1 S=.257

47023 M900-4.0 δ=91 δ0=

WN300-63RF16 RF0 RF=3 b=5.lRFrfB W

bl 50-150 RFR73F)- 160rf/pampampampa

PL100(B)-10R