名词
中文翻译：线锯
同义词：
['saw', 'wire cutter']
例句：
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1. The threadgrinder is used to sharpen thethreads of sewing machines.
线锯用于磨利缝纫机的线。
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2. Hebought a new thread grinder for his workshop.
他为他的车间买了一台新的线锯机。
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3. The old thread grinder broke downlast week, so we had to buya new one.
旧的线锯机上周坏了，所以我们不得不买一个新的。