2種類の溶接材料の合格した溶接評価で、1種類の材料を使って溶接してもよいですか？
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2種類の溶接材料の合格した溶接評価で、1種類の材料を使って溶接してもよいですか？
投稿者が具体的な状況を明記していないため、的確に返信することができません。NB/t47014-2011の6.1.3に従ってください
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