Selection of ground current, comparison of isolation level and consideration of protective device in the resistance ground system are presented.

介绍了电阻接地系统中，接地电流的选取，绝缘水平比较，保护配置方面的考虑。

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With excellent light reflectance and weather resistance, have to save energy, which makes protective layer can be.

具有优良的光线反射能力和耐候性，有利于建筑节能，其上可不做保护层。

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They also show that water absorption could availably evaluate the waterproof ability and resistance to acid and alkali corrosion of concrete protective coatings.

研究还表明吸水率可以有效评价混凝土保护涂层的防水能力和抵抗酸、碱侵蚀的能力。

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The brushed metal case with protective layer provides 9H scratch resistance, which prevents damage even after long-term use.

ENGADGET: ADATA's got an 8.9mm thick portable USB 3.0 drive, limbos under the competition by .1 of a millimeter

The focus that many doctors have on controlling diabetes may be mistaken, possibly counterproductive, if insulin resistance is actually a protective mechanism.

ECONOMIST: Metabolic syndrome