标准摘要
[中文适用范围]： 第一版取消并取代了 ISO 3545:1981。 本部分定义了最常见的符号，旨在标准化和促进钢管及相关产品标准中术语的使用。 六个数字说明了文本的含义。 [外文原描述]： This first edition cancels and replaces ISO 3545:1981. This part defines the most common symbols with the aim of standardizing and facilitating the use of terminology in standards for steel tubes and associated products. Six figures illustrate the meaning of the text.
英文名称Steel tubes and fittings — Symbols for use in specifications — Part 1: Tubes and tubular accessories with circular cross-section