tertiary sewage treatment meaning in English
三级污水处理
Examples
- The first tertiary sewage treatment plant in hong kong will be built in ngong ping , lantau with the award of a hk $ 233 million contract by the drainage services department
渠务署批出一份价值二亿三千三百万元的工程合约，在大屿山昂坪兴建全港首间三级污水处理厂。