Morning News 2888 meters of plastic train tracks, covering an area of ​​200 square meters. Recently, a plastic train successfully completed this long “journey†after 5 hours, and announced that the Guinness World Record of “the world's longest plastic toy train track†was broken. Zhang Yuji, a high school (1) class in Minhang Middle School, was one of the first students to receive this task. Subsequently, another 47 students joined, and under the leadership of the responsible teacher Zhang Zhimin, began the design and construction of the toy train track. Zhang Yuji said that the first choice is iron and aluminum alloy as the support for the entire track. However, one track needs to use twenty or thirty brackets, and 80 nuts are screwed. The manual amount is too large, and the cost is too high, but it is helpless. The second option is to use the original bracket. However, when the test track was set up, it was found that the height between the brackets was not enough for the train to drive, and it could only be abandoned. With the help of the teacher Zhang Zhimin and the experts of Jiaotong University's Power Machinery Institute, the students finally chose to use wood as a track bracket. Although the test track is completed, the small train will still fall. The original position of the track joint is not fixed. Zhang Yuji said that if the spliced ​​track is not flat, the small train will easily derail. “Later we tried to get the seams out of the seams with wood to get stuck, and at the same time put the trailer behind the small train to increase the smoothness of the ride.†Teacher Zhang Zhimin said that the entire track has 13769 sections, each concave The slots are all dug by students. In the end, 47 students completed a track of 2,888 meters in the Science and Technology Museum. The plastic toy train track will be publicly displayed for two weeks at the Shanghai Science and Technology Museum. Bio Knife,Biodegradable Cutlery Knives,Plastic Knife Cutlery,Biodegradable Knife Cutlery Anhui Jianfeng Environmental Protection Technology Co., Ltd , https://www.ahbiocutleries.com