换句话说，外屏蔽把电场封闭在导线和屏蔽层之间。
In other words, the electric field is enclosed in the outer shield conductor and shield layer.
据深部资料结合区域地质特征分析，矿床为一滑覆构造系统。该系统上、下均有砂泥岩作屏蔽层，中间为云岩，形成一个对成矿极为有利的构造封闭系统。
According to regional geology and deep data, the deposit is considered as a gliding nappe system, whose upper and lower shielding layers are sandy mudstone, the middle part is dolomite.
其中尤以地下车站采用全封闭式屏蔽门最为常见。
Particularly, using of the whole closed screen door is the most common in the underground stations.
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