The classification and comparison of Spaces for underground interior design and some manners of space planning were discussed.
讨论了地下室内设计各种空间的分类和对比，以及空间处理的若干手法。
Following the theory on characteristics of first order quasi-linear partial differential equations, classification of the balance equations for two-phase flow in interior ballistics is discussed.
根据一阶拟线性偏微分方程组的特征理论，讨论内弹道两相流方程组的类型。
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