HG/T 21574  吊耳 SP-69

SP-696000 RF Sch80S-

WN250(a)-10rfh40.RF-20-

so20- 150rf

WN80(B)-16 RF42247

1 FM 400-1.6 δs=6

BⅡ 1971

BL 250-25 RF-0.6

BL 50-10 RF

WN50()-40M•¤

IF250-16 RJ0AF5@°F1Ff@4 rfsRF@â°so00R50R4010RF00160FRj00 c=20 f1=345。 n=4 l=18