7

How Levers Help Us

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.
Udio:
 
 
 
 

Žanr: Documentary

Uloge:

Posada:

Zemlja: United States of America

Vrijeme izvođenja: 11 minuta

Kvaliteta: HD

Otpustite: 1970

imdb rating 7

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