A.6312.0/6215.0 B.2187.5/2182.0 C.8414.5/8376.5 D.12577/12290.0
A.天波 B.地波 C.空間波 D.波導(dǎo)
A.2174.5KHZ B.2187.5KHZ C.2182.0KHZ D.A.B.C均是