Trolley case refers to a luggage case with a trolley and rollers. Because of its convenient use, it is widely used. At the same time, the trolley box is also divided into a single tube rod and a double tube rod because the box is equipped with a rod, and the tube of the rod is also divided into a square tube and a round tube to facilitate dragging when walking, which greatly reduces the burden.
The trolley case can be carried by hand or dragged. The wheels of the trolley case we usually use are basically located at the bottom of the box, and modern people have designed a new type of trolley case, which is designed into a cylindrical shape, and the wheels are The entire package is outside the box. This roller design makes this trolley box better adapt to different terrains.
