輕型地面指標 lightweight ground beacon: 輕型地面指標ground beacon: 地面信標dem ground beacon: 測距裝置地面信標dme ground beacon: 測距設(shè)備地面信標dme ground beacon antenna: 測距裝置地面信標天線下載手機詞典可隨時隨地查詞查翻譯