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classificationCode:"ipc:g01j"
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classificationCode:"ipc:g01n"
MARINE PORT SAFETY UNMANNED AERIAL VEHICLE DETECTION SYSTEM
Marine port safety unmanned aerial vehicle detection system
FIXING DEVICE AND METHOD FOR LIFTABLE/LOWERABLE MARINE SURVEYING INSTRUMENT FOR SHIP
PORT TRAFFIC MONITORING DEVICE AND MONITORING METHOD THEREFOR
TARGET FOLLOWING-TYPE AQUACULTURE MONITORING APPARATUS AND METHOD
Port traffic monitoring device and monitoring method thereof