金属加工
旋盤、ディスクグラインダー(グラインダー)など。 レーザー加工(切断、溶接)もある。
↑ Asimov, Isaac: "The Solar System and Back", page 151 ff. Doubleday and Company,Inc. 1969.
↑ Percy Knauth et al.: "The Emergence of Man, The Metalsmiths", page 10-11 ff. Time-Life Books, 1974.
↑ Possehl, Gregory L. (1996). Mehrgarh in Oxford Companion to Archaeology, edited by Brian Fagan. Oxford University Press.
↑ Degarmo, E. Paul; Black, J T.; Kohser, Ronald A. (2003), Materials and Processes in Manufacturing (9th ed.), Wiley, p. 183, ISBN 0-471-65653-4
1 2 Schneider, George. Turning Tools and Operations, American Machinist, January 2010