Earthquake-resistant building and saw: what they have in common

1. Step 1. Earthquake-resistant building — has part — Base isolation. Base isolation.
2. Step 2. Base isolation — is made of — Vulcanized rubber. Rubber–steel bearings.
3. Step 3. Vulcanized rubber — is material for — Rover safety bicycle. The tyres are rubber.
4. Step 4. Rover safety bicycle — has part — Roller chain. A chain drive.
5. Step 5. Roller chain — is part of — Chainsaw. The cutting chain is a roller chain with teeth.
6. Step 6. Chainsaw — evolved from — Saw. A mechanized saw.

Open Evothings