NB/T 47021  法兰 M 700-0.25 δs=10

1 M 700-0.25 δs=10

B WN 700-150 RF S=8

WN RF 10K 25A Sch80 FF11ch424�00O RF S�145442

WN20-150 RF Sch80SRF Sc900 RFLTSch10SrFF M250A@4012 ScJFFRF00AF5

2 RF 1500-1.620δ1=1

BL20-300M32bSF S=1b)pl400

WN600- 25 RF93n400hg.5RFRF-0(b)

WN15(B)-160 M S