How to make Automatic Opening box & Locker|| Apni science knowledge||ASK..

Published on Feb 14, 2019
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Apni science knowledge

How to make Automatic Opening box & Locker|| Apni science knowledge||ASK..

. Hello! Guys☺️☺️

How to make Automatic Opening
instrument box ..
With smart Locker.

with the help of
1- spring
2- pin
3- thread

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