Using the principle of dimensional analysis and the method of regression analysis, the formulas of determining the length of bridge opening were obtained.
应用量纲分析原理和回归分析的方法，提出了各类河段桥孔长度的计算公式。
According to the investigation data of designing for bridge opening, the bridge opening length were analyzed.
根据桥孔调查资料，对桥孔长度进行了全面分析。
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