TY JOUR TI Particular of arrangement of fir-tree structures in fusion of copper conductors at transport vehicles KW fire accidents at transport vehicles KW short circuit KW fir-tree structures KW fusion KW conductors JO Problems of risk management in the technosphere AU Sysoyeva, T.P. AU Motorygin, Y.D. PY 2014 IS 2014 PB Saint-Petersburg University of State Fire Service of Emercom of Russia