NB/T 47021  法兰 C-RF 500-0.6Sch408 BB=

1C-RF 500-0.6Sch408 BB=

BL20(B)-600RFRFFS=3.650

wn20-63mf/C

wn50(b)-63m s=/

WN 300-150 RF.5)

wn300-160rfR)ch80H2.5 δ00e2/u008

WN50-300 RF,B=50= f142rf=34φ89=3

PL 80B-16 RF-250RFCH10SFF SCH10S R

WN50-2500 Rj Sch160z n=12 L

20592wn50-40mfm0085/data/