Standard parts are indispensable parts in most products. When each product is composed of more than two parts, the integrity is basically realized by standard parts. In case the structure, performance and usage of standard parts fail to meet the requirements, no matter how good the quality of other parts is, it cannot guarantee the overall quality of the product, and it will even cause direct economic losses and personal safety in the end.

With the development of science and technology, especially the requirements and demand for standard parts of high-tech products are also increasing, and the technical requirements for standard parts are becoming more and more strict. The whole vehicle wiring harness is used to ensure the realization of various signal transmission and function definitions of the vehicle, and it needs to be connected with the battery, control module, and body. Different parts of the product have different requirements for the mechanical properties, surface quality, precision, structure, operability and electrical properties of the standard parts.