The experiment technology and equipment of ac drive system are the important method of the study, development and speciality teaching of ac traction engine.

交流传动系统实验技术和设备是交流传动机车研究、开发及专业教学的重要手段。

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Design of mechanical precision is a compulsory subject for machinery speciality of engineering college and the teaching quality of its experiment course plays an important role.

机械精度设计是工科院校机械类专业的必修课，其实验课的教学质量至关重要。

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