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      政策標準
      • 行業標準 《建筑用槽式預埋組件》發布
      • 住房和城鄉建設部關于發布行業標準《建筑用槽式預埋組件》的公告現批準《建筑用槽式預埋組件》為建筑工業行業產品標準,編號為JG
      • 發稿時間:2019-07-05 10:57
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