露天礦開拓 mine development: 礦井開發(fā); 礦山開發(fā)surface mine: 露天礦山surface development: 表面展開圖development of uranium mine: 鈾礦開發(fā)air-to-surface mine: 空投的水雷下載手機詞典可隨時隨地查詞查翻譯