Horseshoe nail holes and shaduf: what they have in common

1. Step 1. Horseshoe nail holes — is part of — Horseshoe. Horseshoe nails fix the shoe.
2. Step 2. Horseshoe — is made of — Iron. Iron.
3. Step 3. Iron — is material for — Ratchet. Ratchets are iron.
4. Step 4. Ratchet — is part of — Windlass. A ratchet holds the load.
5. Step 5. Windlass — is used in — Well. The bucket was raised with a windlass.
6. Step 6. Well — uses — Shaduf. Or with a well sweep.

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