浴缸采用的是一种柔软的聚丙烯材料，两层外壳之间有灯。
They are made from a soft polypropylene material and have lights inside a double skin.
聚丙烯膜作介质，金属化膜作电极卷绕而成，无感结构，阻燃环氧树脂封装，阻燃塑料外壳。
The products are made of polypropylene film as the dielectric, metalized film as the electrode, non-inductive construction, encapsulated in a plastic sealed with epoxy resin.
大部分由聚丙烯制成的塑料外壳含有铅电极和硫酸。
The plastic housing, mostly polypropylene, contains lead electrodes and sulphuric acid.
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