NB/T 47021  法兰 RF 1200-0.25 δs=1

1 RF 1200-0.25 δs=1

wn300(b)-40m d=510 c==

47021 M500-1.0F00050B)Ms0061500f

LWN60-300 RF0F b=3dFM0-

BL500-300RF S=8=80F/data

bl150-6t00rfM2

DN250-PN16 PL/W-B RF �

BL 100-100 M0-150 RFch1F00

BL 40-150 RF10Ss2FRFF0 RF Sch40SS.5 rf@WN1500 L

B BL 1100