全面给出了化工过程物料与能量衡算的自由度分析的一般方法，对各种化工过程衡算问题有普遍化的实用意义。
A universal and useful way on analysis of free degree has been proposed in the paper about material and energy balance in process of chemical engineering.
本文简要介绍了长台面曲线电子轨道衡的使用范围、产品结构、工作原理以及产品的可靠性设计等问题。
This article briefly introduces the using scope, product structure, working principle and reliability design of the long center curve electronic railway track scale.
本文针对动态轨道衡应用在矿山特殊环境情况，就矿山动态轨道衡模拟判车问题进行深入研究。
Based on the dynamic weighing application in mines special circumstances, we do the research on the mine car dynamic weighing simulation.
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