Trolley, tractor. It is the ancestor of all vehicles. Despite the continuous development of material handling technology, handcart is still used as an essential handling tool. Because of its low price, handcart is widely used in production and life. Easy to maintain, easy to operate, light weight, can work in the place where it is not convenient to use the car, and it is very convenient to transport the lighter goods in a short distance. The trolley has one single wheel, two wheels, three wheels and four wheels. The wheelbarrow can be driven on narrow springboards, bridges and sheep intestines.
It can be turned to the right place, which is very convenient for dumping goods. The commonly used two wheeled vehicle is a manual carrying vehicle (also known as a tiger car). . trolleys and dump trucks carrying bulk materials. One of the three wheeled carts has two, four wheeled carts with two rotating casters that can swing around a vertical axis (see rotating casters). This type of caster can automatically adjust to the direction of the minimum driving resistance with the change of the vehicle movement direction during the vehicle operation.
Use manpower to push and push vehicles. It is the ancestor of all vehicles. Despite the continuous development of material handling technology, trolleys are still used as essential handling tools. Because of its low price, handcart is widely used in production and life. Easy to maintain, easy to operate, light weight, can work in the place where it is not convenient to use the car, and it is very convenient to carry the lighter items in a short distance.

The trolley has one single wheel, two wheels, three wheels and four wheels. Unicycles can run on narrow springboards, bridges and sheep intestines. It can be turned to the right place, which is very convenient for dumping goods. The commonly used two wheeled vehicle is a manual carrying vehicle (also known as a tiger car). Carts and dumpers carrying bulk materials. One of the three wheeled carts has two, four wheeled carts with two rotating casters that can swing around a vertical axis (see Figure).

This type of caster can automatically adjust to the direction of the minimum driving resistance with the change of the vehicle movement direction during the vehicle operation. Wheelbarrow. Different types of trolleys have different body structures. Most of GM is four wheelers have a loading platform. The special trolley has a variety of structures, the car body is box shaped, suitable for carrying light, easy to load and unload goods.
Some car bodies protrude from the supports to facilitate the placement of shafts, shafts, pipes and other parts; the goods are the same, such as gas cylinders; some are very compact, foldable and portable; some are convenient for loading and unloading paper rolls and other tubular articles, and the car body has two flat steels to form a low slope, so as to facilitate the rolling up and down of the barrels, such as cylindrical loading and unloading trucks. Modern trolleys are equipped with rolling bearings and wheels with solid or pneumatic tires.