本标准规定了主要为电子设备使用的印制线路板以下称为印制板通用要求相关的有外形等各种尺寸以及由专项标准规定的项目-This standard specifies the various sizes primarily used in printed circuit boards of electronic devices hereinafter referred to general requirements related to the PCB shape, etc., and there is a special project by the standards of