The double lever system is internationally patented.
其双杠杆系统拥有国际专利。
A carve tool is presented actuated by PZT with double lever magnify mechanism, and integrated with the bionic robot. Experiment of carving on CD disk surface shows the feasibility of the robot.
研制压电陶瓷驱动双重杠杆放大的刻字作业工具，并与微定位机器人结合实现了光盘表面的刻字作业，验证了系统的有效性。
Based on the analysis of solutions of two examples, the author raised two questions about the using of lever rule in double phase systems.
通过对两个例题的错误解答进行分析，提出了相平衡体系中运用杠杆规则值得注意的两个问题。
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