10 things you don’t know their purpose of making
you will wonder if you know their purpose of making it some of them we see daily and we use daily but still we don’t any thing about it
Its really sad that we don’t have any idea about it for example
1.why there is a little hole on back of my smart phone ? it is between lens and flash on a smart phone?
2.why utility knife had cap on back ? what is its purpose ?
3.why button on lids ?
4.mettle plate on stapler
5.hole at the end of the lollypop stick
6.lid for drinks
7.hole in a pen cap