Four elements, i. e. person, substance, rules and regulations and social environment are put forward after analyzing the subway operation safety situations at home and abroad.
在对国际和国内地铁运营安全形势分析的基础上，笔者提出了地铁运营安全防范的人、物、制度和社会环境四要素，以利于下一步地铁运营安全工作的开展。
The effective design and functional operation of fire safety measures in subway systems are discussed.
另外，还讨论了地铁系统的有效设计和火灾安全设施的正常运作情况。
Safety stable operation of cable subway is the bottle neck of aluminium oxide safety production, and of which the fabrication of the cable intermediate joint is the key.
电缆隧道的安全稳定运行是氧化铝安全生产的瓶颈环节，而电缆的中间接头制作又是其中的关键。
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