公共英语PETS4写作精选短语34
发布时间：2013/8/9 20:44:29 来源：城市网学院 编辑：admin
reventive maintenance
the useful practice of routinely repairing, cleaning and replacing parts on schedule in order to prevent unexpected problems and more expensive repairs in the future
xue.netple:
Following a new preventive maintenance schedule saved our #pany from experiencing the lost time and costly repairs that used to occur.
