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Because the bus and subway safety hammer often lost or damaged, so the bus often cannot use the safety hammer. The safety hammer with Griphook handle fusion reduces the possibility of missing when the accident occurred, with extreme ease, to escape for the precious time.Tail fastening mechanism realizes the pull ring and the safety hammer with rapid transitions between. Angle bending metal percussion head can be easy smashed windows to escape.
Changsha University of Science&Tech
BAI Wei Lan