One company has presented an idea in which metal strips inserted in pavements and roads operate fly wheels 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。
One company has presented an idea in which metal strips inserted in pavements and roads operate fly wheels 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。
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