The boys were tall and clean with fresh face, everything was exciting. They went to Harbin to register in Harbin Institute of Technology as freshmen.

男孩们比较高大，脸庞干净又充满是好奇，事事新鲜兴奋，他们也是新生，去哈尔滨工业大学报道。

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WANG X F. the research on key technology of stress analysis based on infrared thermographic technology [d]. Harbin: Harbin Institute of technology, 2008.

[2]王喜丰。基于红外热像技术的应力分析关键技术研究[D]。哈尔滨：哈尔滨工业大学，2008。

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YU Simiao. Characteristics Analysis and Structure Optimization of Slipper with Static and Dynamic Pressure Support Used in the Axial Piston Pump [d]. Harbin: Harbin Institute of Technology, 2013.

[2]于思淼。轴向柱塞泵用滑靴流体静动压支撑的特性分析及结构优选[D]。哈尔滨：哈尔滨工业大学，2013。

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The authors acknowledge funding from the State Key Laboratory of Robotics and System of Harbin Institute of Technology and the National Natural Science Foundation of China.

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