在有限单元方法中，放开了定近似函数的限制。
In the finite element method, one of the restrictions on the approximating functions is relaxed.
在有限单元方法中，放开了定近似函数的限制。
Study on Truss Element of Finite Element Method and Its Application;
首先，简单地介绍了渗流的基本原理和渗流计算有限单元方法。
First, the basic principle of seepage and FEM for seepage calculation has been described briefly.
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