This is a manual screw press (often called a manual cassava press or de-watering press).
It is a heavy-duty mechanical tool used to squeeze water and liquid out of wet materials using high physical pressure. This is an agricultural grater mill (commonly used as a cassava grater machine).
It features a large blue metal feeding hopper on top, a grinding chamber with wooden/metal rollers inside, and a side drive pulley to connect to an engine via a V-belt.