Rectifier and elevator: what they have in common

1. Step 1. Rectifier — is part of — Power supply. A rectifier.
2. Step 2. Power supply — has part — Transformer. A transformer.
3. Step 3. Transformer — has part — Copper wire. Windings.
4. Step 4. Copper wire — uses — Wire drawing. Drawing.
5. Step 5. Wire drawing — is used in — Wire rope. The wire is drawn.
6. Step 6. Wire rope — is part of — Elevator. The car hangs on cables.

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