南方网3月28日电：婷婷五情天78esc------------bDpmRW-DKISN8118WTE-lmiirkBmQQ

　　根据观研报告网发布的《中国公路养护行业现状深度调研与发展前景预测报告（2023—2030年）》，道路和桥面铺装层的设计寿命一般为15年，而中国的道路和桥面铺装层一般在8年—12年以后需要进行较大规模的养护投入。

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