English to Romanian Tech/Engineering Mechanics / Mech Engineering combina agricola

Threshing and initial separation are done in the threshing
zone as a result of relationship between the rotating
cylinder bars and the stationary open grate concave (4).
Contact with the helical guide vanes (5) causes the
material to move rearward and in a circular route, letting
the material pass over the concave several times.

Multumesc anticipat.