求翻译：本期工程设计直流冷却水系统投加阻垢剂装置和杀菌剂装置系统，闭式循环冷却水系统投加缓蚀剂装置系统，以控制直流冷却水的结垢与闭式循环冷却水的腐蚀。是什么意思？

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This issue of engineering design cocurrent cooling aqueous system throws adds the antisludging agent installment and the disinfectant installment system, the closed cycle cooling aqueous system throws adds the corrosion inhibitor installment system, controls the direct-current cooling water the scal

The engineering design unit once-through cooling water system dosing scale inhibitor and bactericide equipment systems, corrosion inhibitor for closed circulating cooling water system dosing system to control the once-through cooling water fouling and corrosion of closed cycle cooling water.