Traction battery and screw press: what they have in common

1. Step 1. Traction battery — is part of — Electric car. Energy is stored in the traction battery.
2. Step 2. Electric car — has part — Reduction gear. A single-speed reduction gear usually replaces the gearbox.
3. Step 3. Reduction gear — is part of — Turboprop. A propeller gearbox.
4. Step 4. Turboprop — has part — Propeller. A propeller.
5. Step 5. Propeller — uses — Screw. A propeller “screws” itself into the water, like an Archimedes’ screw.
6. Step 6. Screw — is used in — Screw press. The force is produced by turning a screw.

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