名词短语
中文翻译：金属弧气体保护焊接
同义词：
['metal arc welding', 'metal-arc welding', 'metal-arc welding process']
例句：
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1. The steel structure is being welded using a metal-arc gas-shielded welding machine.
使用金属弧气体保护焊接机器正在焊接钢结构。
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2. This method of welding is widely used in the construction industry due to its high efficiency and low cost.
由于其高效率和低成本，这种焊接方法在建筑业中被广泛使用。
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3. The quality of the welding joint directly affects the structural integrity and durability of the metal-arc gas-shielded welding workpiece.
金属弧气体保护焊接工件的焊缝质量直接影响到结构的完整性和耐久性。