标准摘要
[中文适用范围]： 给定的分类包括自然条件和人工条件。指定包括极端（短期）条件的类别。为不同的 ap 提供几组类（由一个数字、一个字母和第二个数字指定） [外文原描述]： Establishes classes of environmental parameters and their severities, covering the extreme (short-term) conditions to which a product may be subjected when being transported, installed, stored and used. Separate groups of classes are given for different product applications.
英文名称Classification of environmental conditions. Part 3: Classification of groups of environmental parameters and their severities. Introduction