Some defects exist in the Surface dense layer.

表面致密层存在有缺陷。

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The outer porous layer is damaged after corrosion, while the inner dense layer played a key role to protect the coating from corrosion.

经一定的腐蚀时间后，微弧氧化陶瓷膜的多孔层最终遭到破坏，而紧密层对防腐蚀起着至关重要的作用。

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During the reduction process, it is possible to obtain metal with dense layer or ultrafine powder by controlling the reaction temperature and chloride concentration.

在还原过程中，控制反应温度及氯化物浓度可以获得金属致密镀层或超微粉末。

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The problem was that (gas) was locked in shale, the extremely dense layer of rock under Dallas and Forth Worth.

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The entire city of Fort Worth sits over a gas dense layer of black rock called the Barnett Shale that only recently became possible to access.

NPR: Drilling for Gas in Dallas-Fort Worth

This is a fundamental change in the business equation, enabling much more robust investment in this layer of wireless infrastructure throughout dense urban environments.

FORBES: Wi-Fi's Task For 2011: Making Networks IPad-Friendly