Based on practical process, defection in aluminum tube neck-spinning is analyzed, and defection sort, cause and prevention method are listed.
结合实际工艺，对铝合金薄壁管缩径旋压的缺陷进行分析，列出了缺陷的种类、产生原因以及预防措施。
Based on the theoretical analysis on brake process of automobiles, the calculation model of practical safe following distance is set up.
在对汽车制动过程理论分析的基础上，建立了实用安全跟车距离计算模型。
Based on the software testing process model POCERM, an effective engineering software testing method is presented in the paper and also is applied to a practical testing project.
该文以POCERM软件测试过程模型为基础，结合一个实际测试项目，阐述了一种有效的软件测试工程化方法。
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