A precise automated work system and method is provided. One or more self-navigating robots can perform automated work operations with precision given six degrees of freedom in a undulating, sloping or irregular terrain, such as, a commercial truck garden. A self-propelled robot moves through the garden...http://www.google.com.hk/patents/US5974348?utm_source=gb-gplus-share專利 US5974348 - System and method for performing mobile robotic work operations
