Gantry portal and syringe: what they have in common

1. Step 1. Gantry portal — is part of — Portal crane. A U-shaped support over the tracks.
2. Step 2. Portal crane — has part — Wire rope. The load hangs on steel cables.
3. Step 3. Wire rope — is part of — Mine hoist. Mine ropes were the first use of wire rope.
4. Step 4. Mine hoist — has part — Watt steam engine. Steam winding engines.
5. Step 5. Watt steam engine — has part — Piston. Steam pushes the piston in the cylinder.
6. Step 6. Piston — is part of — Syringe. A plunger.

Open Evothings