engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Fitter Joining Welding

GMAW प्रक्रिया में कार्बन स्टील निर्माण के लिए कौन सा इलेक्ट्रोड तार अधिक उपयुक्त होता है?

1
70S - 6
2
70T - 2
3
70S - 2
4
70S - 3
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