가스텅스텐아크용접기능사 실기ㅣ특수용접기능사 바뀐 이유ㅣTIG용접ㅣ파이프 용접ㅣ맞대기 용접
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Writer Date24-01-07 00:00 Hit34 Comment0Link
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https://youtu.be/LV90LzFdLT4 4- Connection
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