The tower crane is mainly composed of verticaltower, horizontal tower, tower tower and balance arm, as shown in Figure 3.67.
塔式起重机主要由竖直塔身、水平塔臂、塔顶和平衡臂等主要部件组成，如图3.67所示。
2
Despite my own fear of heights, I felt more grounded than I have on other vertical tourist attractions such as the Eiffel Tower or the Empire State Building.
尽管我自己有恐高症，但与参观埃菲尔铁塔或帝国大厦 等其他垂直旅游景点的感受相比，我感觉更踏实。
3
The Eiffel Tower is a wonderful way of showing the degree to which the vertical axis is virtual.