NB/T 47021  法兰 FF 450-0.25/20δs=126 rf0/82-1.0b8

1 FF 450-0.2520δs=126 rf0/82-1.0b8

PL450(B)-10 RFf=5jH80S/uΞ)-1B=1

3 FF600-1.0(B)-RRRF S

WN 150B-25 RF S=5

WN 1"-300 RF.0/u0fCg16

So 100-150 G

PL250-25RF0M RFfF/mlB)- Sch5sF S=1.2-2009п©б╘п╠Б∙≤п©Б∙═п▒Б┬≥Б┴╓п©