NB/T 47021  法兰 C-RF 600-1.h40S008500-95 H=crop6061001t

47021 c-rf600-1.h40S008500-95 H=crop6061001t

LF/SE 100-150 RF S=S=3.

wn200-600 rfb=20300´=70 h=165C

wn40(b)-25fm-2.5…°-rf 110 r l=15.

WN200(B)-40GTh8400-150 sSR00sF=3M S=7 RFBB=20-600r

3 FM 700-1.6 δ0=10h40 h=/t b=3=45 f3=3 undefined

DN8