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One of the other pieces of equipment is the telescoping boom for the Aerial Ladder.
另一位件设备是伸缩繁荣，为空中的阶梯。
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The boom telescoping mechanism is shown as follows.
吊臂伸缩机构如下图所示。
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The boom telescoping mechanism is shown as follows.
吊臂伸缩机构如下图所示。
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