手推车(wheel barrow; barrow; hand truck)是以人力推、拉的搬运车辆，它是一切车辆的始祖。虽然Trolley materialHandling technology continues to develop, but the cart is still used as an indispensable handling tool。Trolley is widely used in production and life because it has low cost, simple maintenance, easy operation, light weight, can work in places where motor vehicles are inconvenient to use, and is very convenient when carrying lighter items in short distances。

Wheelbarrows are available in one, two, three and four wheels。Unicycles can be driven on narrow gangway, bridge and narrow path, can turn in place, dumping goods is very convenient。The commonly used two-wheeled vehicles are hand-pushed trucks (also known as tiger trucks) for handling items, rack trucks and bucket trucks for handling bulk materials。One of the three wheelbarrows and two of the four wheelbarrows are rotary casters that can be rotated around the vertical shaft (see figure rotary casters).。The rotary casters can be automatically adjusted to the direction of least resistance as the direction of vehicle movement changes。