ARC VERTICAL WELDING 6T (3G)
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12:41
아크용접 6T 수평(2G) 용접기능사,산업기사 ARC WELDING
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16:21
Mil milhões de soldadores não conhecem esta ferramenta caseira! Ferramenta faça você mesmo
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13:51
도면? 알고가야 당황하지 않겠죠~용접기능장,용접기능사,용접산업기사,용접기사
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21:17
용접기능사 실기(9T 수직자세)SMAW vertical position
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12:14
피복아크용접 맞대기 9T 수직 자세(충남기계공고 산업설비과)
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16:08
SMAW WELDING 3G FOR BEGINNERS
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13:58
스틸 플레이트 ARC 2G 용접 테스트
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1:12:46