阐述了在非测试轮下用放置三角木的方法可测得较大的手制动力。
A method, laying a triangular wood under the untested wheel, for testing and measuring parking brake force is described in this paper.
分析了比率制动式发电机纵差保护的制动特性，计算了不同比率制动特性的定值曲线对应的等效闭锁角。
The restrained characteristic of ratio differential protection is analyzed. The equal block angle for the ratio differential protection is calculated.
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