三相交流电动机拖动典型负载机组能效等级 第2部分:螺杆空压机机组能效等级三相交流电动机拖动典型负载机组能效等级 第2部分:螺杆空压机机组能效等级Energy efficiency grade for typical load unit driven by three-phase motor - Part 2:Energy efficiency grade of screw air compressor unit
三相交流电动机拖动典型负载机组能效等级 第1部分:清水离心泵机组能效等级
Energy efficiency grade for typical load unit driven by three-phase motor-Part 1:Energy efficiency grade of centrifugal pump unit for fresh water