Ceramic armor plates and plough: what they have in common

1. Step 1. Ceramic armor plates — is part of — Body armour. Ceramic or steel.
2. Step 2. Body armour — works like — Tank. One idea of protection — armour — at different scales.
3. Step 3. Tank — has part — Transmission (gearbox). The transmission carries torque to the drive sprockets and lets the tank turn.
4. Step 4. Transmission (gearbox) — is part of — Tractor. A transmission.
5. Step 5. Tractor — uses — Steel plough. Ploughing with a tractor.
6. Step 6. Steel plough — evolved from — Plough. A steel share.

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