名词
中文翻译：屋顶撑杆
同义词：
['roof clamp', 'roof lifter']
例句：
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1. The roof jack was used toraise the house's roof.
使用屋顶撑杆来提升房屋的屋顶。
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2. Theroof jack was a crucial tool forfixing the leaky roof.
屋顶撑杆是修理漏水屋顶的关键工具。
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3. The roofjack was used to remove the oldroof and install a new one.
使用屋顶撑杆来移除旧屋顶并安装新屋顶。