1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2. Jiugang Hongxing Iron & Steel Co., Ltd., Jiayuguan 735100, China
3. State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
4. Jiangsu Hengsheng Pharmaceutical Co., Zhangjiagang 215600, China
5. Taizhou Hailings Hydraulic Machinery Co., Taizhou 225300, China