How do Lock and Key work? Mechanism and Manufacturing Explained [Urdu/Hindi]

How does Lock and Key work, how does padlock and key work? Lock and Key manufacturing explained simply in Urdu Hindi language. How lock manufacturing companies produce locks and how keys are unique to their respective locks? The video explains simply the complete mechanism of lock and key how a lock is produced, what differs one lock from another and how a specific key turns the cylinder of the lock to open it.

Resources:
https://www.youtube.com/watch?v=smIdInCQ-kU&
https://www.youtube.com/watch?v=j4IDWWFYDcM
https://www.youtube.com/watch?v=_OkaX7ZTM8U
https://www.youtube.com/watch?v=pKt-m3nH_x4
https://www.youtube.com/watch?v=HHtli67A7eI
https://www.youtube.com/watch?v=tXWAoJtDlp4

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