Slide rides _ Jinan slides slides are integrated manufacturer of sports equipment, slides only conduct activities through climbing ability. Children playing slide requires strong will and confidence that they can develop their bravery. When the child "Sou" slide down when can enjoy the joy of success. Slides as a child physical activity equipment, common in nursery or children's playground, generally suitable for children 3-6 years of age, while there slides a particular purpose, such as used slides and other lifesaving. Slides are mounted high on one side of the ladder rack, mounted on the other side of the slide oblique (generally two straight and curved), children from the ladder up, slide down from the ramp. Playground slide, there are two, one is flat, there is a curved, its surface is rotating wheel slip lines. Assuming the same as the height of the two slides, two children exactly the same weight, respectively, while the decline from the time at the apex of the slide, the first to reach the kids skateboarding on the ground is not flat, but Epitrochoidal children slippery surface. Because the child is able to decline in the slide, because of the role by gravity. Skateboard deck when the slope is not the same in the direction of descent by gravity of the component size is also different. The larger component of gravity, the greater the acceleration of the decline, the faster the speed increase. Slides along a straight decline, falling acceleration remains constant, the speed steadily increases. The rate of decline slides along trochoidal decline beginning of a period of skateboard slope is very large, so that the child fell in a very short period of time to obtain very large. Although the decline in the latter half of the stage, the slope becomes smaller, the speed of increase slowed, but this time the rate of decline has become great. Therefore, the rotary slide along the line fell across the board decline in the average speed of a big stage. Even Epitrochoidal slides slide length greater than the length of the straight slide, slide along the cycloid decline shorter time than the straight slide. This is, in mathematics and physics are proven. Under the same conditions that the same height, spin the wheel along the shortest line decline.