P in order to achieve the required design working life of the structure, adequate measures shall be taken to protect each structural element against the relevant environmental actions.
为了使建筑物达到规定设计使用年限，必须采取充分的措施保护每个构件免受相关环境作用的影响。
P in order to achieve the required design working life of the structure, adequate measures shall be taken to protect each structural element against the relevant environmental actions.
为了使建筑物达到规定设计使用年限，必须采取充分的措施保护每个构件免受相关环境作用的影响。
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