风琴防护罩配备了一个支持稳定性的PVC框架，它可以通过不同的处理方法与外部折叠材料紧密相连。一种风琴式保护套是热键。在一定的温度下,通过特殊的熔剂，内部PVC骨架可以牢固地粘结在外部铰链上。如果在中等温度下使用屏蔽，可以采用这种方法。这种隔热层不需要维护和防水、防尘、耐油、耐酸。

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