Muscular bulldozers clear rocks, trees, and earth. Gargantuan excavators gash through hills and mountains. Special scrapers and graders level roadbeds. Steaming hot pavers belch out new pavement. Here is a full-color gallery of the mighty machines that build our nation's highways.
![The recording and reproduction of sound: [A complete reference manual on audio for the professional and the amateur]](https://m.media-amazon.com/images/I/71Q5R7Qp5SL.jpg "The recording and reproduction of sound: [A complete reference manual on audio for the professional and the amateur]")
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