secondary treatment
短语词组
- secondary oxidation treatment 二级氧化处理
- secondary sewage treatment plants 城市二级污水处理厂
- secondary biochemical treatment 二级生化处理
- secondary solution treatment 二次固溶
- secondary sewage treatment 二级污水处理;[环境]二次污水处理
- secondary sewage treatment works 次级污水处理厂;二级污水处理厂
- secondary national treatment 次国民待遇
- secondary biological treatment 废水的二级生物处理
- secondary waster treatment 二次废料处理 返回 secondary treatment