Watercraft and elevator: what they have in common

1. Step 1. Watercraft — includes — Yacht. A vessel.
2. Step 2. Yacht — has part — Sail. Sails.
3. Step 3. Sail — works like — Tensile structure. Stretched fabric working in tension.
4. Step 4. Tensile structure — has part — Wire rope. Cables.
5. Step 5. Wire rope — is part of — Elevator. The car hangs on cables.

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