METHOD OF ULTRASONIC CHECKING OF ARTICLES - GAREV OLEG L,SU; SROKIN VIKTOR I,SU; KAZARNOVSKIJ DAVID S,SU; LEVCHENKO NIKOLAJ F,SU; SUCHKOV GRIGORIJ M,SU; KRUG GRIGORIJ A,SU; GARKAVYJ VASILIJ V,SU (1985)