數(shù)量變異法 normal variation in quantity: 正常數(shù)量變化quantity method: 變量法; 數(shù)量方法variation method: 變分法economic order quantity method: 經(jīng)濟采購量決定法; 經(jīng)濟訂購量決定法quantity base method: 量底法下載手機詞典可隨時隨地查詞查翻譯