短語詞組短語preventive maintenance servicing interval 預(yù)防性維護(hù)操作周期maintenance inspection interval 維修檢查間隔時(shí)間decision -model of maintenance task interval 維修周期決策模型maintenance interval chart 保養(yǎng)周期表Preventive Maintenance Interval 預(yù)防性維護(hù)間隔;預(yù)防性維修間隔optimal maintenance interval period 最佳維修間隔期service hour maintenance interval 工作時(shí)間保養(yǎng)周期recommended maintenance interval 推薦的保養(yǎng)周期specified maintenance interval 規(guī)定的保養(yǎng)周期 返回 maintenance interval