The technology of processing materials A textbook for students of institutions of secondary vocational education - 4 th ed., Sr. - ("Vocational-engineering") (neck) / Tekhnologiya obrabotki materialov Uchebnik dlya studentov uchrezhdeniy srednego professionalnogo obrazovaniya - 4-e izd.,ster. - ("Srednee professionalnoe obrazovanie-Mashinostroenie") (GRIF)