【摘要】 依据面动成体原理,给出了基本几何体定义,并应用归纳与演绎方法,系统地研究了柱、锥、球、环等常见基本几何体的形体特征、形成方式、投影特征、视图画法、尺寸标注及读图方法等.更多还原

【Abstract】 This essay gives a definition of fundamental bodies according to the principle of moving a plane to become a body, by the methods of induction and deduction systematically studies the shape -characteristics,means of formation,projection-characteristics, view - drawing methods,measurement -markings and metods of interpreting blueprints of most common fundamental geometrical bodies, such as column, cone ,sphere and ring.更多还原