根据能量守恒定律，推导出磨料在圆管边壁处的速度表达式。
Based on the law of energy conservation, the velocity expression of the abrasive flowing along the wall of the round pipe is derived.
根据能量守恒定律，液体变为固体时放-出的热量必定等于该固体变为液体时所需的热量。
According to the Law of Conservation of Energy heat equivalent to that which is required to change a solid into liquid must be given out when the reverse change takes place.
根据基本的质量守恒定律、能量守恒定律以及一些经验公式等建立了系统的动态数学模型。
Based on the mass conservation law, the energy conservation law and some empirical equations, the dynamic model is built.
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