Economic results of pipes with internal coating are described.

文章论述了输气管道采用内涂层管子的经济效益。

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Real blood vessels have an internal coating of cells that ensure that the blood does not clot.

真血管内部有一层细胞包被，可以确保血液不会凝结。

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Pipes with internal coating have been used widely in the world for gas pipeline for past over 50 years because of many advantages.

由于内涂层管子具有很多优点，5 0多年来它在天然气输送管道中得到了广泛应用。

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Its stainless steel cover protects the internal gears, which have the same coating as high-performance racing engines, and features a circular display with a 62-carat sapphire crystal lens.

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The micro-USB port, also found along the left edge, is uncovered, but Motorola had the foresight to bathe both the surface and internal circuitry in a water-resistant coating, which should stand up to the wet weather conditions many Europeans will face heading into winter.

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