- 问题详情:Formostcitypeople,theelevatorisanunremarkablemachinethatinspiresnoneoftheenthusiasmorinterestthatAmericansaffordtrains,jets,andevenbicycles.Dr.ChristopherWilkisamemberofasmallgroupofelevatorexpertswhoconsiderthisamisunderstanding.Withouttheel...
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