名词
中文翻译：扶梯式起重机
同义词：
['trolley crane', 'trolley gantry', 'trolley crane gantry']
例句：
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1. The construction site had a large trestleman in operation.
施工现场有一台大型的扶梯式起重机正在运行。
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2. The engineer carefully inspected the trestleman before starting the project.
工程师在开始项目前仔细检查了扶梯式起重机。
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3. The trestleman was used to lift heavy equipment onto the construction site.
扶梯式起重机被用来将重型设备运到施工现场。