非重要厂用水系统是非安全系统，用于汽机厂房和辅助厂房内非安全负荷的热量导出。
The Raw Cooling Water system is non-essential system which is provides for removal of heat from turbine building loads, as well as some non-essential loads in the auxiliary building.
通过对焦化厂所用水水质和不同用水系统工艺特点的分析，制订焦化厂梯级用水制度，降低水耗30%；
Through the analysis of water quality and processing characteristics of different water system, cascade of water was implemented with a reduction of water consumption by 30%.
另一路的备用水来自原水系统(或称为厂用水)，当需要时可以不间断地向辅助给水系统供水。
An unlimited backup water supply, essential raw cooling water system (or called service water system) is supplied to the auxiliary feedwater system.
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