The tractor adopts fully hydraulic steering system, steel ring press-fitted solid tires and central control panel with alarming function.

采用全液压转向系统、钢圈压配式实心轮胎和具有报警功能的新型中央式仪表板。

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Tests on polyurethane, rubber and other solid tire encapsulation fastness become a problem for manufacturers manufacturing polyurethane, rubber and other solid tires in the world currently.

聚氨酯、橡胶等实心轮胎包胶牢度的测试，目前成为世界上各生产聚氨酯、橡胶实心轮胎厂家的难题。

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One cool bit: the tires were chiseled from solid blocks of rubber, the only way to support the weight of the car.

非常酷的一点：轮胎由结实的橡胶环刻而成(当时的轮胎都不充气的)，这是唯一能支撑车重的方法。

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In fact, this bicycle doesn't use any metal parts at all -- the solid tires are made of reconstituted rubber and a car timing belt is used instead of a chain.

ENGADGET: Cardboard bicycle 'close to mass production': tough, green and just $20