标准摘要
[中文适用范围]： 补充了 IEC 191-1，分别提供了有关第 3.2.4（第 19 页）和 3.3.6（第 21 页）项的替换和插入。 [外文原描述]： Deals with terminals on square or rectangular periphery and lozenge-shaped bases.
英文名称Mechanical standardization of semiconductor devices - Part 1: Preparation of drawings of semiconductor devices - First supplement