名词
中文翻译：无负载接头
同义词：
['unloaded joint', 'unloaded connection']
例句：
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1. The engineerdesigned the new machine to have a packless joint for easy maintenance.
工程师设计了这台新机器，具有无负载接头，便于维护。
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2. The construction crew used a packless joint to connect the two beams together.
建筑工人使用无负载接头将两根梁连接在一起。
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3. The engineer explained that the packless joint would reduce the weight of the structure and improve its durability.
工程师解释说，无负载接头将减少结构的重量并提高其耐用性。