作废 QJ 235-1978
管道用对焊钢法兰 管道用对焊钢法兰
发布日期:1978-02-28
实施日期:1978-02-28
分类信息
发布单位或类别: 中国 行业标准-航天
CCS分类:
ICS分类:
标准简介
相似标准/计划/法规
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UNE-EN 1759-1-2005
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法兰管道

最后更新时间 2025-08-27