TY JOUR TI FUINDAMENTALS DEVELOPMENT FOR COMPUTATION OF SCREW SCREENS FOR BULK MATERIAL SEPARATION AND EXPERIENCE OF THEIR INTRODUCTION TO PRODUCTION KW helical sieve KW fractions KW bulk materials KW particles KW tetrahedral form JO Bulletin of Bryansk state technical university AU Sekisov, A.N. AU Belokur, E.V. AU Serga, G.V. PY 2021 IS 2021 PB Bryansk State Technical University