Recent studies of the history of technology increasingly take as their theme, besides invention, the transfer of technology, that is the adoption of technological knowledge from other societies or the transfer of one's own technology to other regions. The development of Greek civilization in archaic times was to a high degree based on the appropriation of the technological achievements of Egypt and Mesopotamia; while the historically relevant process of Romanization, especially in the western Mediterranean and in north-western Europe, also included the spread of Roman technology in the provinces. An important result of modern research in the history of technology is the insight into the interdependency of technological and economic developments. In ancient agriculture, numerous innovations are attested, for example in the threshing of grain for which rotating sledges were used. Technical advances that were of economic relevance such as grain mill, oil presses, wine presses, can be substantiated in various areas of the ancient economy.