Blood pressure cuff and plough: what they have in common

1. Step 1. Blood pressure cuff — is part of — Blood pressure monitor. An inflatable cuff for the arm.
2. Step 2. Blood pressure monitor — evolved into — Digital blood pressure monitor. An automatic blood pressure monitor.
3. Step 3. Digital blood pressure monitor — is made of — Nylon. The cuff is nylon.
4. Step 4. Nylon — is material for — Toothbrush. Nylon bristles (1938).
5. Step 5. Toothbrush — has part — Handle. A plastic handle.
6. Step 6. Handle — is part of — Plough. Handles for steering the plough.

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