And to make electric conductor or conductor and the distance between the earth have enough insulation, used for type switch gear and other switchgear inside.
并使带电导体间或导体与大地之间有足够的距离绝缘，用于中置式开关柜及其它开关柜内。
Each cylindrical wine cellar relies on the surrounding earth for its insulation and combined with an ingenious air-flow system, it requires no power to maintain its constant temperature.
每个圆柱酒窖依赖于地球周围的绝缘和系统结合为一个巧妙的气流，它不需要电力来维持恒定的温度。
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