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Petroleum Helicopters International, Inc., is an American commercial helicopter operator, founded in 1949, by Robert L.
H-O PRODUCTS CORP. is a Winsted, CT-based company in the Energy and Utilities sector.
Keys Well Drilling is a Saint Paul, MN-based company in the Energy and Utilities sector.
Acero Engineering Inc. is a Calgary, AB-based company in the Energy and Utilities sector.
Concrete Design Inc is a Maryland Heights, MO-based company in the Energy and Utilities sector.