Trolleys are widely used in the world, Europe, North American trolley for garden more trolleys used to mine more of Africa, Middle East countries to building more trolleys manufacturing base for most of Jiaonan, Qingdao, China famous perennial for cart users around the world. Well-known enterprises in Qingdao Qingdao Hua Tian Tai group and vehicles is the most famous. Anti-static carts for semiconductors, IC, food, bio-medicine, manufacturing and cleanroom operations with storage area for goods. Resistance of the antistatic system: 10 6 ~10 9 ω