NB/T 47021  法兰 RF 900-1.6/000-691h6025(b)-25-63RF RFampampa

1-RF 900-1.6000691h6025(b)-25-63RF RFampampa

SO32(B)-16RF0 R0B=530 S b=

WN450(B)-16 RF S=1238 H=

wn400(b)-16gb0s05000o4100RF s=3

wn300(b)-63 rf s=24

3 FM 1200-4fp Sch40S RF BB=74.

wn600-600 rf s=45c3

LWN15(B)-150 RF5d=405 kRFor/20(B)-25 RF6RFrf

WN50