产品型号
2匹KFR-50DLW-B(R3)   KFR-50DLW/D-B(R3)  
3匹KFR-72DLW-B(R3)   KFR-72DLW/D-B(R3)   
5匹KFR-120DLW/S-B(R3)   KFR-120DLW/SD-B(R3)