This is an olive press as would have been used 2000 years ago. There is a donkey (you can just see its ear at knee height to the man and the ass' ass to the right of the pole) that pulls the heavy stone around, to press the oil out of the olives in the bowl. The counterweight at the point of the axle pole is shifted nearer to the wheel, to increase the pressure.
The inhabitants of this country have been using olives, ever since. Olives as food and a great number of uses for the oil, including oil lamps as the standard indoor lighting back then.