This paper studied the application of fly ash on concrete sleeper with the method of ortho design.

本文采用正交设计的方法，对粉煤灰在高强预应力混凝土轨枕中的应用进行了试验研究。

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This paper studied the application of fly ash on concrete sleeper with the method of ortho design.

本文采用正交设计的方法，对粉煤灰在高强预应力混凝土轨枕中的应用进行了试验研究。

youdao