Mouldboard and headphones: what they have in common

1. Step 1. Mouldboard — is part of — Plough. It turns the furrow over.
2. Step 2. Plough — uses — Horse collar. The horse collar made ploughing with horses possible.
3. Step 3. Horse collar — is made of — Leather. The collar and traces are leather.
4. Step 4. Leather — is material for — Bit and bridle. A bridle is leather straps.
5. Step 5. Bit and bridle — has part — Headband. Straps on the head.
6. Step 6. Headband — is part of — Headphones. A band that presses the cups.

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