Bolt and Spanner Size Formula | बोल्ट मई कितने साइज़ का पना लगेगा ऐसे पता करें

Bolt and Spanner Size Formula | बोल्ट मई कितने साइज़ का पना लगेगा ऐसे पता करें
‪@mechanicalstudy2021‬
/ @mechanicalstudy2021
Debasis Sasmal
Rolling mill - Mechanical
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