Window glass and lathe: what they have in common

1. Step 1. Window glass — is part of — Solar panel. Tempered cover glass.
2. Step 2. Solar panel — is part of — Ion thruster. Power supply.
3. Step 3. Ion thruster — is made of — Tungsten. The cathodes are tungsten.
4. Step 4. Tungsten — is material for — High-speed steel. Tungsten.
5. Step 5. High-speed steel — is used in — Lathe. Cutting tools.

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