Vulcanized rubber and shipping container: what they have in common

1. Step 1. Vulcanized rubber — is material for — Pneumatic tyre. A tyre is made of vulcanized rubber.
2. Step 2. Pneumatic tyre — is part of — Landing gear. Aircraft tyres.
3. Step 3. Landing gear — is part of — Cargo aircraft. Landing gear for dirt airstrips.
4. Step 4. Cargo aircraft — uses — Shipping container. Air cargo containers.

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