作废 CB/T 3946-2002
法兰铸钢带波纹管截止止回阀 法兰铸钢带波纹管截止止回阀 Cast steel flanged stop check valves with bellows
发布日期:2002-11-20
实施日期:2003-02-01
分类信息
标准简介
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最后更新时间 2025-08-30