[Problem]I've been having this problem for long: if the bathroom sign is hang on the door and the door is open, I don't know which direction it points. Sometimes I can't even see the sign from certain angles. Also, I'm having a hard time recognizing some 2D signs which share the same meaning but loo...By: gracegotlost
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from Instructables: exploring - technology - robots http://ift.tt/1q0cMt1
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