"Fangming" . . "Low-cost"@en . "Speed control"@en . "Zhang" . "0da6978133f7fc709d6e5d98b5db5392" . "Fangming Zhang" . "Guidance system"@en . . "GPS"@en . "Parallel tracking"@en . "Positioning system"@en . "Path planning"@en . "Tracked combine harvester"@en . "Transplanter"@en . "Kalman filter"@en .