名词
中文翻译：焊接
同义词：
['weld', 'join', 'bond']
例句：
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1. The welding process is crucial for the structural integrity of the bridge.
焊接过程对于桥梁的结构完整性至关重要。
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2. The engineer used a special welding rod to repair the damaged area.
工程师使用一种特殊的焊接棒来修复损坏的区域。
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3. Helium is often used as a propellant in rockets due to its low density and high specific heat capacity.
由于其低密度和高比热容，氦气常被用作火箭的推进剂。