GB/T 37400.7-2019重型机械通用技术条件第7部分:铸钢件补焊国家标准
英文:Heavy mechanical general technical specification—Part 7:Repair welding for steel castings GB/T 37400.7-2019介绍: 国家标准《重...
英文:Heavy mechanical general technical specification—Part 7:Repair welding for steel castings GB/T 37400.7-2019介绍: 国家标准《重...