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domingo, 10 de julio de 2011
The pulley
The screw and the wheel
The lever
Inclined planes
Simple Machines
Simple machines
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presentations
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Crelgo
Energy around us by Andrea del Hoyo and Clara Pérez
Energy around us by andrea del Hoyo y Clara Pérez
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presentations
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Crelgo
Our Health by David Ramos
Our health by david ramos
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presentations
from
Crelgo
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