Power station and elevator: what they have in common

1. Step 1. Power station — uses — Coal. The first stations ran on coal.
2. Step 2. Coal — uses — Coal mine. Extraction.
3. Step 3. Coal mine — has part — Mine hoist. Hoisting.
4. Step 4. Mine hoist — has part — Wire rope. Mine ropes were the first use of wire rope.
5. Step 5. Wire rope — is part of — Elevator. The car hangs on cables.

Open Evothings