电动栏杆机作为机电一体化产品必须采用系统设计思路，综合分析各系统设计的关键技术，才能整体提高栏杆机的主要技术指标。
The main technical indexes of electric barrier, as integration of mechanics and electrics product, can be improved as a whole with system design method and key technologies synthetically analyzed.
当一架推土机开始切割埃尔瓦河大坝的混凝土栏杆的时候，日光间或地划破太平洋西北处上空的云层盖投射下来。
Sunbeams occasionally sliced through the notorious Pacific Northwest cloud cover as a bulldozer started carving out pieces of the Elwha Dam's concrete barrier.
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