Academic paper information Zhao Yan, Liang Yingchun, Bai Qingshun, Wang Bo, Sun Yazhou, Chen Mingjun. Experimental study of micro machine tools, micro tool wear and cutting force in micro milling. Optical Precision Engineering, 2007, 15(6 ):894-902 Liang Yingchun, Zhao Yan, Wang Bo, Bai Qingshun, Chen Mingjun, Sun Yazhou. Micro cutting technology for processing micro parts. Journal of Jilin University (Engineering Edition). Tong Lidong, Bai Qingshun, Zhao Yan, Wang Bo, Liang Yingchun. Micro Research progress on diameter milling cutters and micro milling technology. Tool Technology, 2006, 40(12):3-7 Zhu Dairu, Wang Bo, Zhao Yan, Liang Yingchun. Effect of cutting amount on surface roughness during micro milling of duralumin. Tool Technology, 2007, 41(12):17-20 Jiang Tao, Liang Yingchun, Zhao Yan. Analysis and research on the application of micromechanical products and micro-machining methods. Manufacturing Technology and Machine Tools, 2007, 10:9-13 Zhao Yan, Wu Fenghe , Wang Jun, Ma Xiaocong. The road to reform of metal cutting principles and tool courses under the CDIO training framework. Teaching Research, 2011, 34(2):44-46 Zhao Yan, Li Wenbin and others used dual-spindle milling machine tools for symmetrical machining of turbine rotor blades. Manufacturing Technology and Machine Tools.2012, 8.66-68.