In a classic design, value objects or data transfer objects in those methods are used as method parameters and return values when complex objects are required.
在经典的设计中，这些方法中的值对象或数据传输对象用作方法参数并在需要复杂对象时返回值。
This paper proposes a three-dimension reverse design method of blade based on turbine according to the flow parameters and revolution of pump.
提出了按水泵给定流道参数和转数，从水轮机方向计算叶型的全三维逆向设计方法。
Meanwhile, the design method of the gas-fired boiler was explored, and the construction parameters of each part were calculated.
同时对燃气炉的设计方法进行了探索，通过计算确定了燃气炉各部分的结构参数。
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