Corresponding Author

College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023 China

Key Laboratory of Special Purpose Equipment an-d Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, 310023 China

Correspondence

Yun-feng Liu, College of Mechanical Engineering, Zhejiang University of Technology, 288 Liuhe Rd., Hangzhou 310023, China

Email: liuyf76@126.com;

Fu-dong Zhu, The Affiliated Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China

Email: zfd@zju.edu.cn