然后开始代数变换。

And then starting to turn the crank on the algebra.

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该方法的差分计算网格通过代数变换关系生成，可方便地应用于离心叶轮设计分析。

This method is accomplished with calculation grids generated by an algebraic transformation, and thus it can be easily applied to the design analysis of centrifugal impellers.

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通过一个简单有效的代数变换，将具有未知输入的系统变换成一个不含未知输入的等价系统；

The system with unknown input is translated into an equivalent system without unknown input by a simple algebraic transformation.

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