塔式起重机 ( Construction Tower Cranes ) (4)B30．4—2003门座，塔式和柱式起重机(Portal，Tower， and Pedestal Cranes) (5)B30．5—2000流动式和随车起重机(Mob..
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With six work elevators, the tower hoisted construction materials better-and more cheaply-than any cranes.
这高楼里有六部工作电梯，能更好地吊运建材，比任何吊车都要便宜。
Tower cranes are the construction equipment essential to all kinds of high-rise buildings and large-scale construction projects.
塔式起重机是各类高层建筑和大型建设工程必不可少的施工设备。
As one of the most important machines in construction sites, tower cranes efficiency and safety are crucial to the whole construction process.
塔式起重机作为施工工地上最为重要的大型施工机械之一，其运行效率和安全性对整个施工进程至关重要。
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