跑道区的表面铺设了弹性的橡胶，一般最多设有10根跑道，每根跑道宽1米。

The track area is an elastic rubberized surface containing up to 10 lanes each just over one meter wide.

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它们一般以橡胶弹性体为基料。

They are generally of rubber elastomer-based materials.

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弹性体一般都是是工程塑料或是橡胶组成。

Plum coupling elastomers are generally composed of a plastic or rubber.

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