DRONE SYSTEM, DRONE, DRONE SYSTEM CONTROL METHOD, AND DRONE SYSTEM CONTROL PROGRAM
Intelligent feeding unmanned ship and feeding method thereof
AGRICULTURAL ROAD IDENTIFICATION SYSTEM, CONTROL SYSTEM, AND AGRICULTURAL MACHINE
Mechanical signal device for temporary traffic and using method thereof
WORK INFORMATION MANAGEMENT DEVICE AND WORK INFORMATION MANAGEMENT SYSTEM
AGRICULTURAL MACHINE, AND DEVICE AND METHOD FOR CONTROLLING AGRICULTURAL MACHINE