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This emergency bus hammer is good for use
more easly and safety than nomal one.
Eapecially it is included bus fillers, so It is not
lost any more.
Korea University of technology and
Education
Cheon An, Chung nam, South Korea
Korea University of technology and
Education
Cheon An, Chung nam, South Korea
Hyoungjin, Kim
Seungeon, Jeong
Hyunsik, Woo
Jeha, Lee