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Machines at work
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Machines at work
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2 Total copies, 1 Copies are in, 1 Copies are out.
An introduction to machines, from levers and pulleys to compound machinery, which includes instructions for activities and projects to illustrate the principles.
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Authors
Ward, Alan, 1932-
Subjects
Machinery.
Machinery--Experiments.
Language
English
Series
Project science
Dimensions
27 cm.