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Home › Global Industry Standards › GB/T 4754—2017 › E · 建筑业 › 49 · 建筑安装业 › 491 · 电气安装
GB/T 4754—2017 CN Group
491

电气安装

1
Class
Direct Subordinate Classifications · 1 Items
4910
电气安装
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Peer Categories
491 电气安装 492 管道和设备安装 499 其他建筑安装业
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