Download or read book GB T 3639 2021 Translated English of Chinese Standard GB T3639 2021 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2021-11-05 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document specifies the classification, code, order content, size, shape, weight, tolerance, technical requirements, test methods, inspection rules, packaging, markings, quality certificates of seamless cold-drawn or cold-rolled steel tubes for precision applications.