Since electrification, the railways have been overhung with cables. 鐵路電氣化后，軌道上電纜密布，也成為一種奇特的景觀。
Safety monitoring and comprehensive automatic system for traction substation is the orientation of railway electrification today. 牽引變電所安全監控及綜合自動化系統是目前鐵路電氣化的發展方向。
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