建立了潜入式交汇的泥石流龙头运动方程，并讨论了模型参数的取值。

The equation for describing the movement of debris flow head in submerged flow pattern is established and the method for determining the corresponding parameters is proposed.

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干式电动机潜入水中运行，它的关键技术之一就是密封性能，尤其是动密封性能的保证。

One of the main technology of the submersible motor is the properties of the seals, especially the properties of the seals.

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