建设单位应当自工程竣工验收合格之日起 6 个月内，向国务院建设主管部门备案。（ - 查题网

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国家开放大学 / 建设法规

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建设单位应当自工程竣工验收合格之日起 6 个月内，向国务院建设主管部门备案。（
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