名词
中文翻译：公制线
同义词：
['metric thread', 'metric wire', 'metric threading']
例句：
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1. The engineer used a metric thread toconnect the pipes together.
工程师使用公制螺纹将管道连接起来。
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2. Themachine tool requires metric threadsfor its operation.
这台机床需要公制螺纹来运行。
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3. Thebolts were metric threads, which madethem easy to install.
螺栓是公制螺纹，这使得它们很容易安装。