名词
中文翻译：向下焊接
同义词：
['down-to-earth welding', 'downward welding']
例句：
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1.The engineer used a downward welding technique to repair the pipe.
工程师使用一种向下焊接技术来修理管道。
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2. Downward welding is a method of joining metals together without using solder or other adhesives.
向下焊接是一种不使用焊料或其他粘合剂将金属连接在一起的方法。
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3. During construction, downward welding is often used to join steel beams and columns together.
在建筑施工中，向下焊接通常用于将钢梁和柱连接在一起。