How Levers Help Us (1970)
1970-01-01
(US) •
Documentary
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Overview
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.
1970-01-01
(US) •
Documentary
User
Score
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.
