Chariot and transformer: what they have in common

1. Step 1. Chariot — uses — Bit and bridle. Controlling the horses.
2. Step 2. Bit and bridle — has part — Headband. Straps on the head.
3. Step 3. Headband — is part of — Headphones. A band that presses the cups.
4. Step 4. Headphones — has part — Copper wire. A cable.
5. Step 5. Copper wire — is part of — Transformer. Windings.

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