CD protection layer use business card printing and membership card fabrication, protective layer of material.
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In normal circumstances merely placing a layer of protective material on top of a levee in this way would not do much good.
一般来说如果只是这样在堤坝顶部铺一层类似的保护材料在漫坝时不会起到什么作用。
The iPod touch does this using a layer of capacitive material under a protective covering.
iPod touch依靠位于保护膜之下的一层电容材料来达成上述功能。
The element of fluorsilicone will penetrate into the holes (pores) of the material and form a protective layer to prevent against water and oil.
此外，防护层还能阻止从石材底部吸收上来的水份，防止石材出现水斑、变色、白华、铁锈等现象。
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