A Japanese machine manufacturer and its president were referred to prosecutors Tuesday over an attempt to export to China motors that could be used for military-purpose drones, investigative sources said.The products made by Tokyo-based Tonegawa Seiko Co. could have been delivered to a firm which conducts business with the Chinese People's Liberation Army, according to the sources.Since 2006, the company has exported about 11,000 servo motors, widely used to allow for precise control of angular position, to countries including China and the United Arab Emirates. The machinery maker has made…READ FULL ARTICLE