ISO/TR 25901-4:2016包含适用于电弧焊的术语和定义。它不包含与本技术报告其他部分（见前言）或其他ISO标准中涉及的特定工艺或焊接和相关工艺的特定方面有关的术语和定义。 在ISO/TR 25901本部分的主体中，术语按系统顺序排列。附录A提供了一个索引，其中所有术语均按字母顺序列出，并参考相应的子条款。此外，它还提供法语翻译，涵盖三种ISO官方语言（英语、法语和俄语）中的两种。 还提供德语翻译；这些文件由德国成员机构（DIN）负责发布，仅供参考。 注1:只有官方语言（英语、法语和俄语）中给出的术语才被视为ISO术语和定义。 注2:ISO在线浏览平台（OBP）上也提供了所有这些术语和定义:https://www.iso.org/obp/ui/

ISO/TR 25901-4:2016 contains terms and definitions applicable to arc welding. It does not contain terms and definitions related to specific processes or particular aspects of welding and allied processes that are covered in other parts of this Technical Report (see Foreword) or in other ISO standards. In the main body of this part of ISO/TR 25901, terms are arranged in a systematic order. Annex A provides an index in which all terms are listed alphabetically with reference to the appropriate subclause. In addition, it provides French translations, covering two of the three official ISO languages (English, French and Russian). German translations are also provided; these are published under the responsibility of the member body for Germany (DIN), and are given for information only. NOTE 1 Only the terms given in the official languages (English, French and Russian) are to be considered as ISO terms and definitions. NOTE 2 All these terms and definitions are also available on the ISO Online Browsing Platform (OBP): https://www.iso.org/obp/ui/