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In AT welding process what is the role of closing pin ? (i) To hold the portion before melt (ii) To hold the asbestos powder & slag (iii) Both above are correct* (iv) None of the above

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In AT welding process what is the role of closing pin ?
(i) To hold the portion before melt
(ii) To hold the asbestos powder & slag
(iii) Both above are correct*
(iv) None of the above
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(iii) Both above are correct*
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