NB/T 47021  法兰 C-RF 1300-1.6/20δs=1

1 CRF 1300-1.620δs=1

WN 80-2500 RJ S=8 B=

wn15-150 rf sch40 s=3/

BI10002 S=orumk=75

47022rf1900-0.6S=3.560B)-6 RF

BI 1200 H500600-1.6/4src/h/700rf3�

WN300-150RF B=28910RF5-416460

BL400(B)-10RF=4/Ss50 RF592-20021r1Sch20@

BL25(B)-10 RF97RF Sservle