Trolley common sense

Trolley refers to the box with trolley and roller. Because of its ease of use and widely used. 　　 Trolley box edge to the English word: Luggage case 　　 From the homonym "Luggage", rod. 　　 At the same time, the trolley also box set a lever, a single tube rod and double rod rod points, rod tube also has a square tube and tube points to facilitate towing while walking, greatly reducing the burden. 　　 Trolley can be hand-held can also be dragged, we usually use the trolley wheels are basically at the bottom of the box, and modern people have designed a new form of trolley case, the box design into a cylinder shape, the wheels are The whole outsourcing in the box outside, this drum design makes this suitcase can better adapt to different terrain, such as direct pull the box can easily go up and down the stairs. 　　 The general suitcase according to the material can be divided into two kinds of soft cloth boxes and hard (hard and can be divided into ABS and PP two) can be divided according to the structure of the vertical pull rod and horizontal two According to the size of points can be divided into (from small size to large size): 18 inch '20 inch '22 inch24 inch26 inch28 inch30 inch these types! Commonly used is the 20-inch three-sided and add up to 115CM can carry the size of the aircraft and 28-inch three-sided and together 158CM aircraft can be checked for free standard size.