精选优质文档-倾情为你奉上武汉科技大学本科毕业设计(外文文献) 题 目: 中高压外啮合齿轮泵设计 姓 名: 专 业: 交通运输 学 号: 指导教师: 专心-专注-专业外文文献一 The concept of gear pump is very simple, that it is two of the most basic form of the same size gear in a close co-operation of mutual engagement with the rotating shell, the shells internal similar 8 sh