NB/T 47023  法兰 C-T 1900-0.25/20δ0=163m s0-1.0/

3 CT 1900-0.2520δ0=163m s0-1.0/

wn150-150rf sch/14 D=155 K=120 n=-295R61lwnSch4012s

BL65-600 RF=20H1=1 r

WN 450-150 RF.6 H=1

WN 80(B)-25 RF S=7

BI 800ampampampa20δ1=1816 R

BL80(B)-16 M

SW25-300RF1-RF/80500

WN200-150 RF A=219 S=5h4

SO 50-16 RF B=59