最低工業(yè)品位 grade of ore: 礦石品級; 礦石品位ore grade: 礦石品級; 礦石品位分級minimum grade: 最小坡度; 最小縱斷坡度economic ore: 經(jīng)濟礦藏economic grade: 經(jīng)濟坡度下載手機詞典可隨時隨地查詞查翻譯