摘要
本文借鉴达尔文的生物进化理论，依亲缘关系这一脉络，认识机械产品的发展演化过程，以便为机械的创新设计提供有用的帮助．
With the help of darwin's thory on the evolution of living beings,the developing processof machinery is studied in this thesis according to the clue of consanguinidy. It would be hulpful to the modern design of machines.
关键词
演化
亲缘关系
机械
泵
设计
evolution
consanguinity
machinery
pump
modern design
