Advanced ultra-quiet airport casters casters casters Korean Sometimes, the simplest is the most important invention. Wanda although it can not tell Who first invented the wheel, but the earliest record of access to information that can be traced back 5500 years ago. 

 The invention of the wheel 
 Before the invention of the wheel, one to the ground by pushing or dragging heavy objects, then people could see the smooth stone rolled down from the hill was inspired, only for the wheels to transport to the idea. 
 The first wheel is on a solid wooden carriage wheels. With twenty-three wood pieces together and then cut into circles. They first appeared in about 3200 BC. 
 About 4500 years ago the ancient Egyptians built pyramids as tombs and temples. Groups of workers to move with the wood rolling boulders. 
 Wheels with spokes around 2000 BC began to emerge. This lightweight wheels than solid wheels, transfer was also quite fast, for the chariot. 
 To do with wire spoke wheels in 1800, they light, sturdy. This wheel was first used in cars, bicycles and early Yue machine. The 1950s, car wire wheels replaced by the metal wheels. 

 The emergence of universal casters 
 People invented the wheel, the handling and moving objects much easier, but the wheels can only be run in a straight line, for handling a major change of direction when the object is still very difficult, then people will turn to the structure with the invention of the wheel, That is what we now call the caster or caster. The emergence of the people handling casters, especially with moving objects revolutionary era, people's working efficiency greatly improved. 
 Advanced ultra-quiet airport casters casters casters Korean industrial revolution to modern times with the rise, more and more devices need to move, also need to improve traffic conditions, the design and production of castor get people's attention, almost all walks of life can not do without casters. With the continuous development of modern science and technology, caster has become an indispensable part. Casters from the initial small-scale, decentralized processing workshop for professional development of strong, large-scale industry, a special industry. 

 Castors bring convenience to people 
 It is because of the wheels, have evolved after various casters, caster, today we will have convenience of modern life. The emergence of castor in all aspects of people's daily life had no small influence, perhaps they will also push forward the development of a social power. Castors no edges, you can scroll or rotate evenly, promoting advances in transport, so that bicycles, cars, trains and trams, and other land transport in road, rail or even walk well on uneven ground. 
 In addition, the circular motion of the wheels so that it can continue to pass out of the engine's kinetic energy. Many great inventions have missed the wheel, for example, rely on the pulley on the crane (slotted wheels, slot around the tape) to reduce the force required heavy lifting. 
 Caster is widely used, in almost any industry. According to the needs of different industries, it is to continue to invent all kinds of casters in the world there are about 15,000 different kind of furniture furniture casters, industrial, agricultural, material handling, warehousing, terminal and defense technology and other industries and areas of the airport advanced ultra-quiet casters casters casters Korean