鉴于大家对英语英语考证PETS写作十分关注，我们编辑小组在此为大家搜集整理了“13年有关PETS4写作精选短语之参考点”一文，供大家参考！
13年有关PETS4写作精选短语之参考点
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
Example:
Following a new preventive maintenance schedule saved our company from experiencing the lost time and costly repairs that used to occur.