Rubber core and screw press: what they have in common

1. Step 1. Rubber core — is part of — Golf ball. A rubber core.
2. Step 2. Golf ball — is made of — Vulcanized rubber. Haskell’s ball has rubber thread wound around a core.
3. Step 3. Vulcanized rubber — is material for — Hovercraft. The skirt is rubberized fabric.
4. Step 4. Hovercraft — has part — Propeller. Air propellers.
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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