NB/T 47022  法兰 G 550-1.0/20δ1=10

2 G 550-1.020δ1=10

WN 400-600 FM S=75rfF00-S-16RFsS=6

WN 350-600 rfS=6.6-1644f

WN400-600RF6M0rf s=8S=3.56 n=40R rf s=3

WN 350B-16 FM S=6HF Sch40600-1

WN80(B)-63 rfchMM2crF S=25r

WN 450(B)-16 FM S=80��SCH40S;amp;amp;amp;

BL150-25 TF056s=1F

wn50(a