Legal analysis: "GB 4588.3-88 printed circuit board design and use" in the pcb design specification national standards. Printed circuit board wiring area is mainly by the installation of the type and number of components, and interconnect these components required wiring channel decision. In the case of printed circuit board form factor has been determined, the wiring area is limited by the manufacturing conditions, guide channel and assembly conditions.
Legal basis: "Chinese People's *** and Standardization Law" Article 2 The standards referred to in this law (including standard samples), refers to agriculture, industry, services and social services and other fields need to be unified technical requirements.
Standards include national standards, industry standards, local standards and group standards, enterprise standards. National standards are divided into mandatory standards, recommended standards, industry standards, local standards are recommended standards.
Mandatory standards must be implemented. The state encourages the use of recommendatory standards.