In the actual course of testing, and gradually learned about the software testing, Black Box testing, test case design and optimization.
在实际的测试过程中，逐步了解了软件测试，黑盒测试，测试用例设计和优化。
In this paper, the optimization problem of glass tube air preheater is studied. A current computer code for optimal design of a tubular air preheater is developed. A case calculation is finished.
本文研究玻璃管空气预热器的优化问题，提出了管式空气预热器优化设计的通用计算机软件，并进行了实例计算。
The design optimization of jig construction, jig body, locating mechanism of crank case cores, jacket cores assembling vehicle and jig supporter was discussed.
对夹具结构、夹具本体、轴箱芯定位机构、水套砂芯组芯小车及夹具支架的设计优化进行了讨论。
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