TY JOUR TI FIRE AERIAL LADDERS: HISTORICAL ASPECTS, TECHNICAL SPECIFICATIONS, DESIGN SOLUTIONS KW fire aerial ladder KW model KW specifications KW height KW offset KW set of ladder fly JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Presnov, A.I. AU Pechurin, A.A. AU Danilevich, A.V. PY 2017 IS 2017 PB Saint-Petersburg University of State Fire Service of Emercom of Russia