Respirator and truck: what they have in common

1. Step 1. Respirator — is made of — Vulcanized rubber. The mask is rubber.
2. Step 2. Vulcanized rubber — is material for — Hovercraft. The skirt is rubberized fabric.
3. Step 3. Hovercraft — is a kind of — Amphibious vehicle. A hovercraft is amphibious: it glides over water and land alike.
4. Step 4. Amphibious vehicle — evolved from — Truck. A truck chassis.

Open Evothings