1. One cogwheel engages with the next.

2. The cogwheels are not engaging.

3. The cogwheel later became a laurel wreath.

4. If the big cogwheel does not engage with the small one, the machine stops.

5. Cogwheel from a Jungfrau Railway railcar and geared rail .

6. A cogwheel is placed where the wheat and rice stems cross at the base.

7. Below it there is a cogwheel, a symbol of the working class.

8. Red ribbon forms a knot in the centre of the cogwheel.