Two-course Radio Range 双航路无线电导航 ; 双航路导航台

four course radio range 四道无线电导航台 ; 四道导航电台

Four-Course Radio Range 四航路无线电导航台

four-course radio range station [航] 四航道无线电导航台

course radio range station 四航道无线电导航台

fourcentre course radio range 四航向无线电信标

two course radio range beacon 双航向无线电信标

four-course low-frequency radio range 四航道低频无线电信标

four course IF radio range 四航向中频无线电信标