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混凝土使用量是衡量一个国家基本建设容量的重要标志。进入21世纪以来,随着国家大规模基础设施建设的快速推进,混凝土机械得
Concrete usage is an important indicator of a country’s capital construction capacity. Since entering the 21st century, with the rapid promotion of national large-scale infrastructure construction, concrete machinery