德国电梯公司蒂森克虏伯集团为测试公司开发的新型无绳电梯系统（据称是史上第一个无绳电梯系统）建起了761英尺的电梯试验塔，并且是以“创新的滑模成型技术”在十个月内建起来的。试验塔听起来如此霸气，这种新型电梯更是霸气侧漏，电梯轿厢不仅可以垂直移动，还可以在水平方向上运行，这意味着一条电梯井道可以同时通过数个在楼内流动的轿厢，彻底使“等电梯”成为过去式。

　　A German Company Built This Entire Tower to Test an Elevator

　　Not only did German company ThyssenKrupp build this entire 761-foot tower solely to test their new cable-free (the first in the world, they claim) elevator system, but it topped out in less than 10 months, using an "innovative slipforming technique." But as cool as the tower is, the elevator sounds way better, with cabs that can move not just vertically but horizontally, which means that an elevator shaft could feature mutiples cabs that could circulate throughout the building, making waiting for the elevator a thing of the past.