old drainage pipe net是什么意思 old drainage pipe net怎么读
old drainage pipe net的相关资料
old drainage pipe net的用法和样例
- No drainage entity may drain sewage into the urban drainage pipe network and its accessory facilities if it fails to obtain an urban drainage license.
未取得城市排水许可证书，排水户不得向城市排水管网及其附属设施排放污水。
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