전기용접 기능사 실기 9T 수평 SMAW horizontal position
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12:02
Soldagem de tubo raiz 6010
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12:51
Se houver uma lacuna de 1 mm! Processo incrível para soldagem TIG com apenas um disparo
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9:52
용접 기능사 실기 9T 아래보기 SMAW flat position
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11:27
6g Weld Test -2" Schedule 80 6010 root 7018 cap UA-8
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8:51
como soldar | soldadura para principiantes | dicas e truques de soldagem | soldagem a arco
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15:50
아크용접 9T 수직, ARC WELDING 9T 3G 용접기능사,용접산업기사,용접기능장
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13:34
Aprenda a soldar raiz e tampa de tubo 7018
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10:20