Rubber hammer head and tank: what they have in common

1. Step 1. Rubber hammer head — is part of — Reflex hammer. A soft striking part.
2. Step 2. Reflex hammer — is made of — Vulcanized rubber. A rubber head.
3. Step 3. Vulcanized rubber — is material for — Road wheel. With a rubber tyre.
4. Step 4. Road wheel — is part of — Continuous track. Road wheels roll along the track and carry the vehicle’s weight.
5. Step 5. Continuous track — is part of — Tank. Tracks let a tank cross trenches and rough ground.

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