1.Non-standard precision parts
Precision parts processing can be divided into standard parts processing and non-standard parts processing. Normally, standard parts processing is relatively easy, and non-standard parts processing is more difficult.

2.low volume production
Due to the wide range of batch production, it is usually divided into "mass production" , "medium batch production" and "small batch production" . Small batch production refers to the production of a single product which is basically a special product with small batch demand. One-piece small batch production is a typical order-oriented production, its characteristics are similar to one-piece production, customarily called "one-piece small batch production" . Therefore, in a sense, the "one-piece small batch production" , more in line with the actual situation of enterprises.
3.prototyping
Prototyping is one or more functional templates which are made according to the product appearance drawing or structure drawing without opening the mould, and used to check the appearance or structure rationality. According to the different equipment used, the CNC hand board can be divided into laser rapid prototyping (SLA and machining center (CNC) and (3d printing) . CNC( prototyping): Stable Quality, high accuracy, high repetition accuracy, can be processed. The advantage of CNC (prototyping) which can reflect the information expressed in the drawing very accurate, and the quality of product surface is high, especially with the finishing treatment of spraying and screen printing, even more brilliant than the products with opening the mold. Therefore, CNC milling have become the main stream of prototyping manufacturing industry.