2018-12-07
A "Red Dragonfly" sings many children's childhood memories, bamboo rafts, swings, slides, etc., but the slides are not only our childhood memories, but also our delivery tools!By using the conversion of potential energy and kinetic energy, with the appropriate angle, the use of the article can slide from the height to the destination without the external force, in order to avoid collision after the coasting to the destination, the buffer device is set and designed on the track side. Open for eas