One company has parented an idea in which metal strips inserted in pavements and roads operate flywheels by means of a piston action using hydraulic fluid.

 
  • 一个公司提出这样想法:嵌在人行道和路面上的金属条用液压活塞的作用使飞轮转动。
今日热词
目录 附录 查词历史