分析了氧枪坠落事故的根本原因。
The basic reasons leading to oxygen lance falling are analyzed.
虽然没有发生意外或坠落事故，联邦航空局也在采取行动。
And while no accidents or crashes have happened because of it, the FAA is taking action.
文中应用安全系统工程中的事故树分析方法对天井吊罐运行中人员坠落事故进行了分析。
In the paper, the FTA of system safety engineering is used to analyze the accident of person dropout in moving raise cage.
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