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person:("KIM yong JIN")
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person:("KIM seong JIN")
DEVICE MOUNTED ON A PLANE FOR INFORMING THE MARINE CRASH SITE
APPARATUS AND METHOD FOR DETECTING ABNORMAL FIXED BOLT
METHOD AND APPARATUS FOR TRANSMITTING SIGNAL BY USING RADIO UNIT
METHOD AND APPARATUS FOR RECEIVING UPLINK SIGNAL IN TRAIN COMMUNICATION NETWORK
INPUT DEVICE HAVING OPERATION BUTTON FORMED BY VARIABLE PROTRUSION
DRONE THAT CAN REDUCE IMPACT WHEN LANDING ON THE GROUND