The tests are like little design documents, little coding examples, that describe how the system works and how to use it.
测试就像是小型的设计文档，小型的代码样例，描述了系统的工作和使用方式。
The designation system of metallic materials in AECMA was introduced in this paper. The coding of conditions in metallic materials was also presented. And some examples were shown.
扼要介绍了欧洲（AECMA）规定采用的金属材料牌号九位字母与数字的表示方法，也介绍了金属材料状态的字母代号表示方法，并给出了一些示例。
The designation system of metallic materials in AECMA was introduced in this paper. The coding of conditions in metallic materials was also presented. And some examples were shown.
扼要介绍了欧洲（AECMA）规定采用的金属材料牌号九位字母与数字的表示方法，也介绍了金属材料状态的字母代号表示方法，并给出了一些示例。
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