The source, damage, evaluation and protection about electromagnetic radiation are introduced. Research status about protection material for electromagnetic radiation in home is proposed.
介绍了电磁辐射的常见辐射源及其危害、评价、防护方法，阐述了国内电磁辐射防护材料的最新研究动态。
The negative ion element will become the gas source center and form an ejection in the process of evaporation of coating material, so decrease the damage threshold of the coatings.
并且提出负离子元素在膜料蒸发过程中形成气源中心，产生喷溅，从而使薄膜的损伤阈值降低。
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