How Does a Ballpoint Pen Work?
How Does a Ballpoint Pen Work? Inside a ballpoint pen is a little plastic or metal tube that holds a supply of ink. At the tip of the pen is a tiny ball which fits...
Read MoreHow Does a Ballpoint Pen Work? Inside a ballpoint pen is a little plastic or metal tube that holds a supply of ink. At the tip of the pen is a tiny ball which fits...
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