Bernie Petro, director of engineering at Northern States Metals Co., ...

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Photo by Robert K. Yosay | published: July 12, 2011

Bernie Petro, director of engineering at Northern States Metals Co., Youngstown, shows how the flex racks his company makes can accommodate many types of solar panels. The company, which originally produced aluminum extrusions, has adapted to create green jobs in the Mahoning Valley.



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