Steel rails must be incorporated into the streets (in an emergency, firefighters must be able to pass). Materials can range from granite cubes, asphalt mat or grass carpet.

钢轨必须嵌入街道（在紧急情况下，消防员必须能够通过） 。材料可以从花岗岩块、沥青垫和人造草毯之间选择。

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This paper describes a test study method of mat base material mix for asphalt concrete core wall.

介绍沥青混凝土心墙基座垫层料配合比的试验研究方法。

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