作者简介：谢兴阳(1982-),男,北京化工大学机电学院在读机械设计及理论专业研究生.
作者单位：谢兴阳（北京化工大学机电工程学院,北京,100029）
何亚东（北京化工大学机电工程学院,北京,100029）
信春玲（北京化工大学机电工程学院,北京,100029）
李庆春（北京化工大学机电工程学院,北京,100029）
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