The superimposing method of waves is given. The significance reference coordinate system and the solving process for some quantities are indicated.
总结了波叠加的方法，指出了基准坐标系的重要性与有关量的求解方法。
It also proposes to make use of the superimposing method to explain the structure of ingots and provides some clues for restraining the columnar growth.
同时，还提议用叠加法来解释铸锭的结构，并提出了某些抑制柱状晶的想法。
It also proposes to make use of the superimposing method to explain the structure of ingots and provides some clues for restraining the columnar growth.
同时，还提议用叠加法来解释铸锭的结构，并提出了某些抑制柱状晶的想法。
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