介绍了建筑物外墙涂层劣化的主要表现、原因及防治对策。
Main features, causations and corresponding countermeasures of deterioration of paint film for exterior wall are described.
黑色岩层是一种分布广泛且较为特殊的一类岩石，它的风化往往会加速各类岩石以及工程建筑物材料的风化与劣化过程。
As a special kind of rocks, black strata are distributed widely. Their weathering usually accelerates weathering process of each kind of rocks and engineering structure materials.
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