Author Description
Explains the principles and describes the uses of such simple machines as the pulley, wedge, lever and others.
Page Count:
47
Publication Date:
1974-01-01
Publisher:
Benefic Press
ISBN-10:
081757431X
Explains the principles and describes the uses of such simple machines as the pulley, wedge, lever and others.
Page Count:
47
Publication Date:
1974-01-01
Publisher:
Benefic Press
ISBN-10:
081757431X
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