Lathe headstock and rocket: what they have in common

1. Step 1. Lathe headstock — is part of — Lathe. It rotates the workpiece.
2. Step 2. Lathe — uses — High-speed steel. Cutting tools.
3. Step 3. High-speed steel — is made of — Tungsten. Tungsten.
4. Step 4. Tungsten — is material for — Ion thruster. The cathodes are tungsten.
5. Step 5. Ion thruster — uses — Reaction force. Jet thrust.
6. Step 6. Reaction force — is used in — Rocket. A rocket moves by reaction force.

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