名词
中文翻译：环形锯
同义词：
['ring saw', 'circular saw']
例句：
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1. The engineer used a ring saw to cut through the concrete.
工程师用环形锯切穿了混凝土。
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2. He used a circular saw to cut the wood into pieces.
他用圆锯将木头切成了块。
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3. The carpenter needed a ring saw for his new project.
木匠需要环形锯来完成他的新项目。