On November 12, 2010, the Environmental Protection Bureau of Chengguan District of Lhasa City added 30 environmental sanitation mechanical vehicles, including 2 sweepers, 3 sprinklers, 8 compression lift trucks after 3 tons, and 8 tons of compressed air cleaners. There are 17 trains and a total investment of 10 million yuan. With the use of these equipments, the road cleaning mechanization operation rate in Lhasa will be greatly improved, and the closed rate of refuse removal will reach over 90%, which will effectively reduce the pollution to the surrounding environment and reduce the labor intensity of sanitation workers. According to Sang Zhu, the person in charge of the Environmental Protection Bureau of Lhasa City Chengguan District, at present, there are a total of 119 environmental health vehicles in the Chengguan District Environmental Sanitation Bureau, but these vehicles are aging seriously. There are tractors and other non-special vehicles in the 119 environmental sanitation machinery vehicles. These vehicles have small capacity, low work efficiency, high fuel consumption, and high maintenance costs. Secondary pollution will also occur during transportation. In the future, the use of tractors and agricultural vehicles for environmental sanitation operations will be phased out, regular scheduled collections will be implemented, and closed transportation will be carried out. Sangzhu also told reporters that at present, garbage containers and garbage cans placed on the streets of Lhasa not only affect the appearance of Lhasa, but also cause secondary pollution. In order to reduce secondary pollution, rubbish containers on roads such as Deji Road, Jinzhu West Road, Xuela Road, and Barkhor Street have been banned, and rubbish containers on road sections such as the Tibetan Thermal Road will be gradually banned. It is understood that among the 30 new environmental sanitation machinery vehicles, three sprinklers and two sweepers are specially prepared for the old town. They are small in size and can freely clean the road in the alleys of the old city. Planet Speed Variator,Stepless Speed Variator,Aluminium Cast Iron Gearbox,Mb Series Speed Variator Dongfang Driving Machine Co., Ltd. , http://www.wzgearreducer.com