Photocopier and shipping container: what they have in common

1. Step 1. Photocopier — is made of — Carbon. Toner is carbon black in resin.
2. Step 2. Carbon — is material for — Tyre tread. With carbon black for strength.
3. Step 3. Tyre tread — is part of — Pneumatic tyre. A tread.
4. Step 4. Pneumatic tyre — is part of — Landing gear. Aircraft tyres.
5. Step 5. Landing gear — is part of — Cargo aircraft. Landing gear for dirt airstrips.
6. Step 6. Cargo aircraft — uses — Shipping container. Air cargo containers.

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