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Lazer pens
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Why do ball point pens dry out quicker when the end is exposed?
Started by thedocBoard General Science |
Replies: 3 Views: 9062 |
15/07/2012 21:13:26 by CZARCAR |
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Does the colour of my pens affect my exam performance?
Started by Geoffrey Hunt Board Physiology & Medicine |
Replies: 2 Views: 3990 |
10/03/2010 15:57:44 by Don_1 |