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How Levers Help Us

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This instructional film shows the three parts of a lever and demonstrates how various levers help to move things more easily, or move them farther and faster.
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Genre: Documentaire

Jeter:

Réalisateur:

Pays: United States

Durée: 11 minutes

Qualité: HD

Libération: 1970

How Levers Help Us (1970) - IMDb  6

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