The primary components of the system are a connection device made from PVC and polystyrene foam.

主要组成部分的系统是一个连接装置由聚氯乙烯和聚苯乙烯泡沫塑料。

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So, polystyrene foamed plastic and polyurethane hard foam to the flame retardant function to ensure the whole system how much the fire prevention safety?

那么，聚苯乙烯泡沫塑料和聚氨酯硬质泡沫材料的阻燃机能达到何等程度才能保证整个体系的防火安全？

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Experts believe that: from the perspective of the whole world, the treatment of polystyrene foam is a serious question.

专家以为：从全世界规模来看，聚苯乙烯泡沫塑料的处理都是个严峻的疑问。

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Polystyrene foam containers have long been used by street vendors and take-out restaurants as a cheap way to keep in the heat and sauces of meals sold to on-the-go customers.

WSJ: New Yorkers react to mayor's plastic foam ban push