MESM and CNC machine: what they have in common

1. Step 1. MESM — has part — Vacuum tube. About 6,000 vacuum tubes.
2. Step 2. Vacuum tube — is made of — Tungsten. The cathode is a tungsten filament.
3. Step 3. Tungsten — is material for — Cemented carbide. Tungsten carbide.
4. Step 4. Cemented carbide — is used in — Milling machine. Milling cutters.
5. Step 5. Milling machine — evolved into — CNC machine. The first CNC machines were milling machines (MIT, 1952).

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