On the basis of freeboard phenomenon in curve way and the improvement of curve flow velocity, this paper gets a useful calculating method of bed roughness.
本文基于弯道超高现象以及弯道流速计算的改进，得出了一种较为实用的泥石流沟床糙率计算方法。
A simple and useful method for calculating the static roof pressure has also been disscussed.
提出了简单实用的顶板静压计算模型与方法。
The design method of damping spring in vibration hammer is developed in this paper. Espacially a selecting range is introduced for calculating damping parameter, which is useful in design.
介绍了振动锤隔振弹簧设计方法给出了隔振参数计算必要的取值范围，可供实际设计参考。
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