GB/T 32970-2016高温高压管道用直缝埋弧焊接钢管国家标准
英文:Longitudinal submerged-arc welded steel pipe for high pressure service at high temperatures GB/T 32970-2016介绍: 国家标准《高...
英文:Longitudinal submerged-arc welded steel pipe for high pressure service at high temperatures GB/T 32970-2016介绍: 国家标准《高...