The course of development of EPDM composite coloured shingle is described with focus on its main materials and self-stick layer.

介绍了EPDM复合彩瓦的研制过程，并对其中的主体材料和自粘层作了详细的论述。

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Of course, self problems of technology and immaturity restrict development of unexpected event.

当然网络媒体自身的技术和不成熟带来的问题，也会制约突发事件报道。

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