Mechanical Principles (movie): Close up we see pistons move up and down or side to side. Pendulums sway, the small parts of machinery move. Gears drive larger wheels. Gears within gears spin. Shafts turn some mechanism that is out of sight. Screws revolve and m... Discover the latest Discussions, Reviews, Quotes, Theories, Explanations and Analysis of Mechanical Principles below
Directed by: Ralph Steiner
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