【航空學】航途最小儀表高度 mea minimum en-route altitude: 最低航路高度minimum en-route altitude (mea): 最低航路高度minimum en-route altitude ifr: 最低航路高度minimum off route altitude: 最低偏航高度minimum enroute instrument altitude: 航途最小儀表高度下載手機詞典可隨時隨地查詞查翻譯