In the paper, the whole process of bearing product CAD is systematically introduced, and the working flowchart and program chart of CAD system are given.
文中系统地介绍了轴承产品计算机设计的全过程，并给出了CAD系统工作流程图和程序框图。
The synthesis methods of resorcinol were introduced systematically in this paper, and the summary comments for every means were made.
系统介绍了间苯二酚诸多的合成方法，并对其中的磺化法、异丙苯法、芳化法和取代法进行了简要的评述。
On the base of practical experience, the reasons for affecting the stability of Flame Photometer are systematically analysed and the practical solutions are introduced in this paper.
根据实践经验， 系统地分析了影响火焰光度计稳定度的三种原因，并通过分析找出了相应的判断方法和解决措施。
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