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June 29, 2016

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An Allen Engineering concrete paver is operated while sitting atop twin blades during 40th anniversary of the World Of Concrete at the Las Vegas Convention Center on Wednesday, Jan. 22, 2014.

L.E. Baskow

An Allen Engineering concrete paver is operated while sitting atop twin blades during 40th anniversary of the World Of Concrete at the Las Vegas Convention Center on Wednesday, Jan. 22, 2014.