作废 SY/T 0442-1997
钢质管道熔结环氧粉末内涂层技术标准 钢质管道熔结环氧粉末内涂层技术标准 Technological standard of internal coating of fusion bonded epoxy for steel pipeline
发布日期:1997-12-28
实施日期:1998-06-01
分类信息
标准简介
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最后更新时间 2025-08-29