There should be strict operating procedures and technical measures to ensure the maintenance of safe, reliable and fast to avoid the accident occurred.

应有严格的技术措施和操作程序，以确保维修工作安全、可靠和快捷，避免意外事故发生。

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The paper discusses some problems that need to be adverted to when operating the installed equipment to ensure the power supply security and prevent man-made operation accident.

本文探讨了已设计安装好的设备在操作中确保供电安全，杜绝人为操作事故应注意的一些问题。

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When bearing operating voltage, switching overvoltage or atmospheric over-voltage in the process of operating, the transmission line are likely to occur insulation flashover accident.

输电线路在运行过程中承受工作电压、操作过电压或大气过电压时，都可能会发生绝缘闪络事故。

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All warning systems were operating correctly at the time of Katie's accident.

BBC: Train death Katie Littlewood 'did not look' at crossing

Cross-examining Mr McKay, lawyers acting for Transocean got him to agree that Deepwater Horizon had been "a very safe operating rig" but only "up until the accident".

BBC: BP 'egregious' for drilling Macondo oil spill well

Since the accident, the transit authority has stopped using a computer system designed to avoid collisions and is operating the trains manually, leading to delays.

CNN: NTSB says train detection system failed in days before D.C. crash