belt tension drum

  • 71Nationalization of oil supplies — The nationalization of oil supplies refers to the process of deprivatization of oil production operations, generally in the purpose of obtaining more revenue from oil for oil producing countries. This process, which should not be confused with… …

    Wikipedia

  • 72pre-Columbian civilizations — Introduction       the aboriginal American Indian (Mesoamerican Indian) cultures that evolved in Meso America (part of Mexico and Central America) and the Andean region (western South America) prior to Spanish exploration and conquest in the 16th …

    Universalium