Trevi Finanziaria Industriale. The Company's principal activities are construction and engineering. The construction sector is mainly involved in services for civil and infra-structural foundation works. The engineering sector designs and manufactures plant and equipment for special foundation works, for tunnel boring, for well-drilling, for oil and water exploration. Foundation works accounted for 57% of 2001 revenues; construction machinery, 21%; drilling machinery, 17% and oil well drilling, 5%.