[網絡] 固定訊號周期;固定周期法 fixed period: 固定周期; 規(guī)定的期限material requirement report -by period: 物料需求報表a fixed or limited period of time: 這里指“extended for a fixed period of time: 延長一個確定的時間fixed base period: 固定基期下載手機詞典可隨時隨地查詞查翻譯