GB/T 40371-2021气焊设备焊接、切割及相关工艺设备用材料标准
英文:Gas welding equipment—Materials for equipment used in gas welding, cutting and allied processes GB/T 40371-2021介绍: 国家...
英文:Gas welding equipment—Materials for equipment used in gas welding, cutting and allied processes GB/T 40371-2021介绍: 国家...