Celluloid and turbine: what they have in common

1. Step 1. Celluloid — is material for — Photographic film. The first flexible film was celluloid.
2. Step 2. Photographic film — is used in — Film projector. It shows film.
3. Step 3. Film projector — has part — Geneva drive. Intermittent advance of the film.
4. Step 4. Geneva drive — uses — Torque. It turns continuous rotation into intermittent motion.
5. Step 5. Torque — is used in — Turbine. The flow creates torque.

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