LearnJoy electronic punching system will be used. The organizer will provide the control CARDS free of charge.
本赛事采用乐嘉电子打卡及计时系统，大会将免费提供电子控卡予参加者使用。
Our factory specializes in the production of electronic circuit board needle punching required Chong.
本厂专业生产电子线路板冲孔所需冲针。
This article introduced several problems in the design of punching die for electronic watch champed plate. Provided several select methods of design value.
本文介绍了电子表夹板零件冲模设计中应解决的几个问题，给出了几种结构参数的选择方法。
This article introduced several problems in the design of punching die for electronic watch champed plate. Provided several select methods of design value.
本文介绍了电子表夹板零件冲模设计中应解决的几个问题，给出了几种结构参数的选择方法。
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