These towers, or "blades," pinwheel about a triangular central shaft that holds elevators and mechanical equipment.

这些塔，或称“叶片”，围绕着一个三角形中心轴旋转，中心轴承载着电梯和机械设备。

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It had a circular elevator shaft for the round elevators that he believed would be the vertical transportation of the future, although it did not receive one that fit until a 1970s renovation.

WSJ: Cooper Union's New Building, at 41 Cooper Square | By WSJ Architecture Critic Ada Louis Huxtable