名词
中文翻译：四杆链
同义词：
['four-bar link', 'four-bar linkage', 'four-bar linkage system']
例句：
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1. The four-bar chain is used to connect two pieces of machinery together.
四杆链用于将两台机械连接在一起。
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2. In the four-bar chain system, each link has a specific weight and length.
在四杆链系统中，每个链接都有特定的重量和长度。
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3.The four-bar chain was designed to simplify the assembly process for heavy equipment.
四杆链的设计是为了简化重型设备的组装过程。