engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Fitter Lapping and Honing

लैप आमतौर पर _______के बने होते हैं।

1. लोहे

2. तांबे

3. पीतल या सीसा

1
1, 2
2
2, 3
3
1, 3
4
1, 2, 3
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