Makes the reasonable appraisal to the road surface practical performance, is the surface maintenance management system basic constituent.

对路面使用性能作出合理的评价，是路面养护管理系统基本的组成部分。

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The concrete measures contain choosing high quality materials, improving mix proportion, using anti-cracking agent and intensifying surface maintenance.

具体而言，要优选材料、改进配合比、喷洒污用防裂剂、还要加强面层护养等措施。

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The same forces that create surface tension in any sample of water are responsible for the maintenance of these unbroken columns of water.

在任何水样中造成表面张力的力支持着这些不断的水柱。

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"At three of these locations our investigations concluded that the noise should be mitigated through the installation of low noise surfacing materials when the existing surface is worn out, in accordance with our maintenance policy, " said an agency spokesperson.

BBC: Gloucester estate residents complain about M5 noise

Tests carried out in 2004 on the boards of this room dating back to the 1830s revealed the original surface beneath grime, discolored varnish and the repainting done by maintenance staff over fifty years ago.

FORBES: The Work of Undoing the Past

It is extremely rare on earth as it is created during very active nuclear reactions, most commonly found on the surface of the sun, but here can only be found as a by-product of the maintenance of nuclear weapons.

CNN: Mining the moon for a nuclear future