화염방사기 달린 드론 VIDEO: Drone with a flamethrower to clear debris from power lines.

건설과학 Construction,Science/환경안전 Environment,Safety|2018. 6. 20. 16:14


Drone with a flamethrower to clear debris from power lines.

전기줄에 걸린 쓰레기 소각에 최적

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