Brick and parachute: what they have in common

1. Step 1. Brick — is material for — Open-hearth furnace. An open-hearth furnace is built of firebrick.
2. Step 2. Open-hearth furnace — is part of — Steel works. A steelmaking shop.
3. Step 3. Steel works — has part — Overhead crane. Overhead cranes.
4. Step 4. Overhead crane — has part — Block and tackle. A block and tackle.
5. Step 5. Block and tackle — has part — Rope. The rope runs around the pulleys.
6. Step 6. Rope — is part of — Parachute. The lines are ropes.

Open Evothings