即使是很微不足道的、无伤大雅的设计上的小小缺陷，最终也会被放大成巨大的阴影，因为API只需要提供一次，但是却会被调用很多次。
Even minor and quite innocent design flaws have a tendency to get magnified out of all proportion because APIs are provided once, but are called many times.
在其孔型设计中，合理地分配了成型道次和弯曲角。
The finishing passes and bending angel were reasonably distributed during pass design.
因此，以降低轧制功率为目标，优化设计道次压下量以取得降低能耗的目的，有着积极的作用和意义。
So it is very meaningful to optimize the assign of reduction, as to reduce power consuming index.
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