大量的研究资料表明，进入路面结构内的自由水是造成路面损坏的首要因素。
A large number of research materials indicate that primary factor causing the road surface to be damaged is water entering in road surface structure.
单位锯通常用来提供伸缩缝，清除路段路面损坏、清洁保养修理随机裂缝、清除混凝土路段拆除。
Flat saws are typically used to provide expansion joints, remove damaged pavement sections, clean and repair random cracks for repair, and remove concrete sections for demolition purposes.
造成水泥混凝土路面损坏的原因是多方面的，其中最主要的原因之一是与水泥混凝土材料的脆性有关。
The damage of the cement concrete pavement are caused by many reasons, one of the main causes is the brittleness of the concrete material.
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