How Does It Work?

Front Cover
Smithmark Pub, Feb 1, 1990 - Machinery - 32 pages
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The marvels of technology are part of a child's everyday world. Here, in simple language with clear illustrations, are answers to the difficult questions children often ask about how things work-- from vacuum cleaners and cameras to magnifying glasses and tape recorders.

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Contents

Section 1
Section 2
Section 3

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