NB/T 47022  法兰 RF 700-1.

NB/T4702 RF700-1.

WN20-16RFS=6RF5choker0022121H=161f-o0

BL 600-10 M D=730 C=4

WN 500(B)-16 RF B=502-1

3 CRF 3000-2.520δ0=208164200=10.65o19ch

BL 300-300 RF00rf0g/0 δ0=17q50R

WN250-300m s

WN80-150 RF S=8=4.54/6 G›058040

wn50-150rf sch80s s=5.51000