1. School of Mechanical Engineering Guangxi University Nanning China
2. School of Mechanical Engineering Tiangong University Tianjin China
3. State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan China
4. Jiangsu Wanji Transmission Technology Co., Ltd. Taizhou China
5. Ningbo Zhongda Leader Transmission Equipment Co., Ltd. Ningbo China
6. Shenzhen Hefa Gear Machinery Co., Ltd. Shenzhen China