精选优质文档-倾情为你奉上LESSON 1 MACHINE ELEMENTSHowever simple, any machine is a combination of individual components generally known as machine elements or parts. Thus if a machine is completely dismantle, a collection of simple parts remains, such as nuts, bolts, springs, gears, cams, and shafts- the building blocks of an machinery.A machine element is, therefore, a single unit designed to perform a specific function and capable of combining with other elements. Sometimes certain elements are
