PARA-FOIL TRAWL DOORS

摘要

PURPOSE: A troll spreading board is provided to minimize occurrence of turbulence and to secure good spreading force. CONSTITUTION: A troll spreading board comprises: a body(10); a ceiling plate and a bottom plate(30) which are formed in both sides of the body; foils(40) which are installed at a regular interval; a first connecting loop which is formed in the body; and a connecting loop(50) for net connection. The foil is bent in a shape corresponding to the body in the longitudinal direction.