DCHP-1 Online
roto-thresh (combine) 
n. a rotary combine invented by the Streich Brothers of Clandeboye, Manitoba, in the 1950's which separates chaff from grain by a blast of air through a rotating drum.
- 1964 To date, we haven't found any grain or seed which the roto-thresh couldn't handle.
- 1964 The flow of material through the roto-thresh combine closely parallels that of a conventional machine--up to a point.
- 1964 To date, we haven't found any grain or seed which the roto-thresh couldn't handle.