名词
中文翻译：投影焊缝
同义词：
['projection weld', 'projection welding joint']
例句：
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1. The engineer useda projector to show the schematic of the new building.
工程师使用投影仪来展示新建筑的示意图。
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2.The construction crew was working on the projection welded joints of the bridge.
施工队正在桥上进行焊接工作，这是一项重要的工程任务。
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3. The project manager carefully inspected the projection welded joints before they were installed.
项目经理在安装前仔细检查了焊接接头的质量。