HG/T 21574  吊耳 SP-50

bâ… 500-s

PJ/SE 300(B)-10 RF s=6h8i121-1.6RF0c2/900

wn 50-16 rf6c1.0/F(b)-10≤п▒О500

WN150B-25RF S=10L100(0S RC0RJ9 SO50B- 500-2.5..5/d=55fh-200

PL20b-10RF.6/-4.04FM1F-4.5 S=14f2=4

NB/T47021 FM500-1.6 S＝8

3 M 700-