L245R是什么材质
材料牌号: L245R 标准: ISO 3183-2007 Petroleum and natural gas industries -- Steel pipe for pipeline transportation systems国家与地区: International 钢组: 结构钢 注释: ISO 3183:2007 is not applicable to cast pipe. Application: Seamless and welded steel···
2025-01-23 03:09:19