名词
中文翻译：摩擦锯
同义词：
['fatigue saw', 'cutting saw', 'grinder']
例句：
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1. The friction saw was used to cut through the concrete quickly.
使用摩擦锯快速切割混凝土。
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2. The engineer needed a new friction saw for his project.
工程师需要一台新的摩擦锯来完成他的项目。
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3. The old friction saw broke down, so they had to buy a new one.
旧的摩擦锯坏了，所以他们不得不买一台新的。