Valve trumpet and elevator: what they have in common

1. Step 1. Valve trumpet — has part — Valve. Valves.
2. Step 2. Valve — is part of — Watt steam engine. A slide valve distributes the steam.
3. Step 3. Watt steam engine — is part of — Mine hoist. Steam winding engines.
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.

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