TY JOUR TI PRODUCTIVITY OF FORCES OF TRAWL SYSTEM: PROBLEM FORMULATION KW trawl system KW physical modeling KW similarity scales KW productivity of forces KW efficiency KW material point KW design JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Nedostup, A.A. AU Razhev, A.. PY 2021 IS PB Astrakhan State Technical University