Stack of conical discs and internal combustion engine: what they have in common

1. Step 1. Stack of conical discs — is part of — Cream separator. A stack of conical discs speeds up separation.
2. Step 2. Cream separator — uses — Centrifugal effect. Separation by density.
3. Step 3. Centrifugal effect — is used in — Impeller. The vanes throw the liquid away from the centre.
4. Step 4. Impeller — is part of — Water-jet propulsion. An impeller.
5. Step 5. Water-jet propulsion — is part of — Jet ski. A water jet.
6. Step 6. Jet ski — has part — Internal combustion engine. An engine.

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