动词短语
中文翻译：向上焊接
同义词：
['upward welding', 'upward soldering']
例句：
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1. The engineers were instructed to perform upward welding on the metal structure.
工程师被指示对金属结构进行向上焊接。
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2. During theconstruction phase, it is important to ensurethat all components are properly upside downbefore welding.
在施工阶段，确保所有部件正确倒置后进行焊接是很重要的。
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3. Upward welding isa critical step in the assembly process,as it ensures the structural integrity of thefinal product.
向上焊接是组装过程中的关键步骤，因为它确保了最终产品结构的完整性。