在生产实际中有一种如图1所示的机件（该机件上与本文无关的孔、圆角等都省略未画）。该机件是由一块平板和一部分圆柱面构成，且圆柱面部分又被切割出几个大小和形状不同的类似于牙齿形状的齿。对此机件采用什么样的表达方法，才能符合《机械制图》中“在完整、清楚地表达机件 In practice, there is a production of machinery as shown in Figure 1 (the parts of this article has nothing to do with the hole, fillet, etc. are omitted omitted). The machine is composed of a flat plate and a part of the cylindrical surface, and the cylindrical surface portion is again cut out a number of different sizes and shapes of tooth-like teeth. What parts of the expression of this method, in order to meet the “mechanical drawing” in a complete and clear expression of mechanical parts