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답변을 요청하세요

2020-05-03View Original

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구형탱크 용접결함을 보수할 때 용접부의 내부결함은 카본아크가우징으로 제거할 수 있으나 깊이는 ()를 초과할 수 없다. A. 구형외판 공칭두께의 5% B. 2mm C. 구형외판 두께의 2/3 D. 3mm 정답을 알려주실 수 있도록 도와주세요.

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