Natural environment is an inner element of human survival.
自然环境是人生存的内在要素。
Because the aerial imagery is acquired by the way of vertical photography, the banking angle is very small, almost closing to zero, and the inner element is known.
由于航空遥感影像近似竖直摄影的特性，倾斜角非常小，几乎接近于零，而且内方位元素已知。
This paper introduces a new type vacuum circuit-breaker by analyzing the current mine flameproof feed switches. The advantages of it as the inner element for the flameproof feed switch are expatiated.
本文在分析国内矿用隔爆馈电开关现状的基础上介绍了一种新型真空断路器，并阐述其作为隔爆馈电开关内装元件的优越性。
This paper introduces a new type vacuum circuit-breaker by analyzing the current mine flameproof feed switches. The advantages of it as the inner element for the flameproof feed switch are expatiated.
本文在分析国内矿用隔爆馈电开关现状的基础上介绍了一种新型真空断路器，并阐述其作为隔爆馈电开关内装元件的优越性。
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