Plasma and lathe: what they have in common

1. Step 1. Plasma — is used in — Ion thruster. An ionized gas.
2. Step 2. Ion thruster — is made of — Tungsten. The cathodes are tungsten.
3. Step 3. Tungsten — is material for — High-speed steel. Tungsten.
4. Step 4. High-speed steel — is used in — Lathe. Cutting tools.

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