试验结果表明：与国内外常用的经验公式相比，理论公式的计算值与实测值吻合较好，相对误差仅为5.05%。
The results show that the new formula was in good agreement with the data of different types of sprinklers comparing with other empirical formulas, and the relative error is only 5.05%.
在生产活动和科学技术分析中，需要一些常用的简单初等函数来拟合经验公式。
In productive activity and scientific analysis, some common simple primary functions are used to fit empirical equation.
系统地阐述了悬臂式掘进机主要技术参数的选择方法，给出了常用的经验数据和计算公式。
Selected method of main technical parameters of boom roadheader are expounded systematically, common experiential datas and computing formulas are given.
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