... central air conditioning duct systems in hotels, restaurant, shower center, super market, etc. effective and no harm to environment ... ): 0.5~26 mins8.Whirlwind System: controlled separately.9.Equipment Measurements: 380*380*750(mm)10.Weight: 50kg ( function ... .productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Duct Cleaning Equipment, Duct Cleaning Machine, Duct Brushing Cleaner