经最新确认，大陆旅游团24日在台北遭遇的起重机吊臂掉落事故造成2死3伤，其中一人生命垂危。

A careless mistake is being blamed for the death of 2 mainland tourists in a crane crash accident in Taipei Friday. Three others were injured, one critically, in the incident.

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介绍了一起因限位失效导致的起重机事故，深入分析了大小车极限位置限制器的失效原因，并从多方面提出了预防措施。

A crane accident caused by invalid position limit is introduced. The causes for invalid position limiters are analyzed, and the preventive measures are proposed.

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计算结果表明，桥式起重机伤害事故发生的可能性服从某一分布，而不应为某一点的估计值。

Computation shows that possibility of bridge crane accident obeys some distribution and isn't the estimated value of a certain point.

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