Porcelain and rocket: what they have in common

1. Step 1. Porcelain — is material for — Composite armour. Ceramic layers.
2. Step 2. Composite armour — is part of — Tank. Multi-layer armour.
3. Step 3. Tank — has part — Machine gun. The Mark I’s machine guns.
4. Step 4. Machine gun — uses — Reaction force. Recoil energy reloads the weapon.
5. Step 5. Reaction force — is used in — Rocket. A rocket moves by reaction force.

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