Certainly, if you have ever visited chain stores, you will notice that a series of equipment and supplies are always common and are present in all these stores; such as check-out desks, store stands, etc. A shopping cart or trolley is one of these important equipments, which is actually necessary for the convenience of the store's customers. Trolleys are available in various sizes and capacities. Company D, which is a manufacturer of shop equipment, has produced its shopping carts in different types and capacities of 60 liters, 80 liters and 125 liters. In the design of this shopping cart, the basic and important principles of wheeled trolley design have been observed; Also, its metal wires are nickel-plated, which, as you know, is a strong and resistant metal that has a shiny silver color.