他们使用特殊的设施和决策支持设备(电脑系统)来保障安全和高效的飞行。
They monitor the flights using special equipment and decision support tools (computers) that ensure a safe and efficient flight.
埕岛海区处于特殊的地理位置，是海底地质灾害频发地带，因而直接威胁到海上工程设施的安全。
Based on the especially geography situation, Chengdao area is typically characterized by geologic hazards, which will threaten the safety of the offshore engineering.
市政设施养护作业基于其本身存在的特点，不同于一般建筑工程施工，安全管理也存在着特殊性。
Based on its own features, the maintenance work for the public facilities is different from the common construction of the building engineering, and its safety management has some particularities.
市政设施养护作业基于其本身存在的特点，不同于一般建筑工程施工，安全管理也存在着特殊性。
Based on its own features, the maintenance work for the public facilities is different from the common construction of the building engineering, and its safety management has some particularities.
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