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Petróleo Brasileiro S.A. é uma empresa de capital aberto, cujo acionista majoritário é o Governo do Brasil, sendo, portanto, uma empresa estatal de economia mista.
Williams Petroleum Consulting is a Boston, MA-based company in the Energy and Utilities sector.
envirochem is a Erath, LA-based company in the Energy and Utilities sector.
Norconrth Cllins Cylinder Gas is a Springville, NY-based company in the Energy and Utilities sector.