Zuse Z3 and conveyor belt: what they have in common

1. Step 1. Zuse Z3 — uses — Program control of a machine. The program was on punched cinema film.
2. Step 2. Program control of a machine — is used in — CNC machine. The tool’s movement is set by a program — at first on punched tape.
3. Step 3. CNC machine — evolved from — Milling machine. The first CNC machines were milling machines (MIT, 1952).
4. Step 4. Milling machine — uses — Cemented carbide. Milling cutters.
5. Step 5. Cemented carbide — is material for — Tunnel boring machine. The cutters are cemented carbide.
6. Step 6. Tunnel boring machine — has part — Conveyor belt. Spoil is removed by a conveyor.

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