许多国家制造铧式犁的工厂所生产的犁,都是自成系列的。有的厂生产好几个系列犁产品。其型号和规格多达数十种,甚至上百种。系列划分的原则虽各有不同,但基本上不外乎是以产品的某种特征(如梁架的结构形式或安全装置的类型等)为基础,按不同的犁体数排成两铧、三铧、 The ploughs produced in many countries that manufacture plow ploughs are self-contained. Some plants produce several series of plough products. There are dozens or even hundreds of models and specifications. Although the principle of series division is different, it is basically based on a certain feature of the product (such as the structure of the beam frame or the type of safety device, etc.), and is arranged in two rows according to the number of different plows. Sanhe,