용접기술 동영상 [전진법]
1:15
Added: 2 years ago
From: haroc7
Views: 7,881
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  • 교육용이라 하더라도 용접할땐 기본적으로 모자나 가죽장갑끼고 합시다.

    윗사람이 먼저 모범을 보입시다

    yurarinmiho 1 year ago

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