title: [Improvement of working conditions during on-the-job training of student-machine operators in a petroleum industry trade school].
mesh_terms: D000293:Adolescent; D002617:Chemical Industry; D006801:Humans; D009787:Occupational Medicine; D010578:Petroleum; D012572:School Health Services
chemical_list: D010578:Petroleum
vernacular_title: Voprosy ozdorovleniia usloviĭ truda pri prokhozhdenii proizvodstvennoĭ praktiki uchashchimisia-apparatchikami proftekhuchilishcha neftekhimicheskikh proizvodstv.