That's why polystyrene is ideal for use in bicycle helmets and other protective gear.
这也是为什么聚苯乙烯是制作自行车头盔以及其他保护装置的理想材料的原因。
A rain cover for a faucet of an electric bicycle relates to a rain gear.
一种电动自行车龙头防雨罩，涉及一种雨具。
A rain cover for a faucet of an electric bicycle relates to a rain gear.
一种电动自行车龙头防雨罩，涉及一种雨具。
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