The model constructed in the abstract world and the use of the matrix mark method to solve equations make it possible to realize flood routing and simulation, and the algorithm is universal.
在抽象世界里构建模型，用矩阵标识法求解，实现了流域洪水演进模拟，算法具有通用性。
The traditional mark printing method has metal electricity India and the matrix stamping and so on, now uses the laser to hit the sign and air operated hits the sign way.
传统的标记打印方法有金属电印和字模压印等，现在广范采用激光打标与气动打标方式。
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