NB/T 47022  法兰 RF 700-4.0/20δ1=10

2 RF 700-4.020δ1=10

WN 200(B)-40RF

WN 1000(B)-300 RF

PL500B)-10 FFF HG-4

3fm1500-1.050WN40H=2b=3

法兰 LWN50-300 RF B=52 H

WN 100-150 RFF RF

WN100-2500RF=73g3R0222.5 RF RF

wn250-150rf SC

PL450-16RFampaRmpampRF7=80S R S=8 &ampachd=212 c=20t0RF