The tires of the earliest cars were solid.
最

车轮胎是实心
。
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课 This streamlined vehicle had a number of innovative features including having the steering wheel on the left, an entirely enclosed transmission engine, four cylinders cast in solid block, and a pair of semi-elliptic suspension springs.
这款流线型汽车具有许多创新功能,包
左侧方向盘、完全封闭的变速器发动机、四个实心铸件气缸和一对半椭圆形悬挂弹簧。
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