Orthogonal trial method still has some problems that can not be ignored in practice.
正交试验法在应用过程中均存在一些不容忽略的问题。
The authors introduce conditions of mix design of pavement cement concrete, demand of design, parameter of design and calculating ways, and introduce orthogonal trial method briefly .
本文简述了路面水泥砼配合比设计的依据，设计要求，设计参数及其计算方法，并概略的介绍了正交试验法。
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