标 准 号：DIN 1615-1984 简体中文标题：无特殊要求的非合金钢焊接管.交货技术条件 繁体中文标题：无特殊要求的非合金钢焊接管.交货技术条件 English Name：Welded circular unalloyed steel tubes not subject to special requirements; technical delivery conditions...