urban drainage pipe network

基本解釋

Urban drainage pipe network is important establishment of a city.
城市排水管網(wǎng)是城市的重要基礎(chǔ)設(shè)施。
In this paper, the theorem is proved in which the layout of urban drainage pipe network systems must be a tree structure.
本文證明了城市排水管網(wǎng)系統(tǒng)最優(yōu)布局為樹(shù)狀結(jié)構(gòu)的定理；
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.
未取得城市排水許可證書(shū)，排水戶不得向城市排水管網(wǎng)及其附屬設(shè)施排放污水。