NB/T 47021  法兰 RF 400-0.6 δs=65/3

1 RF 400-0.6 δs=65/3

BL80-150 FF C=6x-s4R

WN 250(B)-16 RF

WN 100(B)-16 RF S=6

WN 280(B)-16 RF

wn500B-40RFpr.5/3/u

wn80a-63m0 RFà0 RFFRF.6RF6

WN150-25 RF RF.2(b)- RF HGh4

SO200-16 RFjhbspq11G

WN50-300 RF70f-6rj/F��=(B)- sch/��h4000R)- RF HGh4s=6