电梯系统——包括底座、轨道和机房——可以被安装在工厂里，把受伤的风险降到最小。

Elevator systems—the base, rails, and machine room—can be installed at the factory, eliminating the risk of injury.

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这是由被安装在一起的金属杆组成的。

This is made of metal poles which are fitted together.

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这些杠杆被安装在坦克的一侧，彼此之间紧挨着。

The levers were fitted to the side of the tank next to each other.

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