在第二阶段，在优化设计区间中利用响应曲面法建立锡膏印刷过程的精确模型。
On the second phase, response surface method is adopted to build the accurate models in the reduced parameter ranges.
该设计比其它两个选项更复杂，因为系统将不得不跟踪两个时间区间。
This design is more complex than the other two options since the system will have to track two time intervals.
与其设计一个全新的产品去适应某一价格区间，大多数制造商会决定使用一个成本更低的方式，简单的“削减”一下现有高端产品的功能。
Instead of designing a completely new product to fit a certain price range, large scale manufacturing dictates that it is often cheaper to simply "cripple" an existing high-end product.
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