Hangu biological stabilization pond was set up in 1993.
汉沽生物稳定塘建于1993年。
Synthetic biological pond system is a new type of stabilization pond system.
综合生物塘系统是一种新型稳定塘系统。
Catfish are stocked and harvested in the last phase of the facility's waste stabilization pond system.
鲶鱼的放养和丰收都在工厂废水稳定塘系统的最后一阶段。
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