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自稓降机诞生以来,它的安全性一直担忧。直到1852年,艾利莎·奥的斯设计并向人们展示了一款带有安全装置的电梯(升降机),
Since its inception, its safety has been worrying. Until 1852, Alyssa Otis designed and showed people an elevator (lift) with safety devices.