Kualifikasi kinerja Combi Cooler Freezer PF-20 F.15 di Gudang B PT. Enseval Putera Megatrading TBK Distribution Center 1 Jakarta = Performance qualification of Combi Cooler Freezer PF-20 F.15 at Warehouse B PT. Enseval Putera Megatrading TBK Distribution Center 1 Jakarta