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American petroleum institute

U.S. trade association for the oil and natural gas industry

Pronunciation
/əˈmɛrəkən pəˈtroʊliəm ˈɪnstəˌtjut/
/əˈmɛrɪkən pɪˈtrəʊlɪəm ˈɪnstɪtjuːt/