Paved road and plough: what they have in common

1. Step 1. Paved road — has part — Mortar. Roman roads had layers set in mortar.
2. Step 2. Mortar — is used in — Trowel. It applies mortar.
3. Step 3. Trowel — has part — Handle. A handle on a curved neck.
4. Step 4. Handle — is part of — Plough. Handles for steering the plough.

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