通过对水垢形成原因分析，指出水垢对设备运行效率的影响。
Pass the analysis of causes taking form to scale, point out an impact of scale over working efficiency of equipment.
线路普遍存在的功率因数偏低现象，一方面会增加电网无功电流，另一方面会使电气设备运行效率降低。
The line exits power factor lower phenomenon that may increase virtual current and decrease operation efficiency of equipment.
在工业生产管理中，市场需求、产品本身的需求以及设备运行效率等都是影响工厂生产能力的关键变量。
In the industry manufacturing management, marketing demand, product requirement and equipment performance efficiency are the key variables determining factory's capacity.
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