路面预防性养护的实用性能与国外相比还有很大差距。
The utility performance of PPM also has the very big gap compared with abroad.
路面预防性养护是与传统纠正性养护不同的一种高标准养护方式。
Pavement preventive maintenance is different from the tradition, especially in its scope, characteristics and common-seen measures.
路面预防性养护是公路养护的一种新的理念，道路沥青砼面层早期病害是公路中常见的一种现象。
The preventive maintenance of highway pavement is a new concept in highway maintenance; the early hazard in highway asphalt pavement is a common phenomenon in highways.
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