Drum washing machine in the washing, the drum will continue to roll, the barrel underwear will be driven to a high place, and then fall with the gravity. It is very suitable for washing clothes mainly made of wool and cotton, as well as silk, pure wool, cotton and chemical fiber fabrics. but the disadvantages are time-consuming, power consumption and high price.The general capacity of automatic washing machine is 6kg or 7kg. for those with a capacity of about 5.6kg, choose a washing machine of 600 * 450 * 850mm; for those with a capacity of 6.5kg, choose a washing machine of 910 * 670 * 660mm; for those with a general capacity of 7kg, we usually choose a washing machine of 600 * 600 * 850mm.most of the 600 revolutions per minute are the old ones with no speed change, and the grade is relatively low; the ones with speed change above 800 revolutions can be adjusted and dried according to different requirements of clothing fabric; the ones with high speed can reach 1200 revolutions. most of the washing machines with a rotating speed of more than 1000 have the function of fast washing, and the short time is about 25 minutes, which can avoid the long-time washing of the washing machine.