The preventive maintenance during the normal service period of the corroded chemical structural is to ensure the structure fulfill its designed service function in the given service time.
在正常使用过程中化工结构的预防性维修，主要目的是保证结构在预定时间内能完成其设计使用功能。
Preventive equipment maintenance is to maintain equipment periodically according to a period and a conventional time interval and is a normal measure for equipment maintenance and management.
预防性设备维护是按周期、约定时间间隔对设备定期进行维护，是设备维护管理常用的手段之一。
The key of preventive maintenance is to select right treatment in the right time for the right pavement according to its condition.
关键是根据路面状况，找准时机，选择合适的预防性养护措施。
The key of preventive maintenance is to select right treatment in the right time for the right pavement according to its condition.
关键是根据路面状况，找准时机，选择合适的预防性养护措施。
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