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On the basis of the structure of round buttons and the problems that might occur in the injection process,the design of the runner and gate of the injection moulds for forming round butˉtons is stated in detail.

从圆形按钮产品结构和出现的问题出发,详细阐述了圆形按钮模具流道设计和浇口设计。

Test research on limit load of sphericalvessel with elliptical nozzle;

带椭圆形接管球形容器极限载荷的试验研究

Besides,round connecting plates are easy to connect many members with variable angles.

其中,使用圆形连接板便于多杆件、变角度连接,加工和安装方便,规格简化,造型简洁、美观,收到了较好效果。