Refrigerant and CNC machine: what they have in common

1. Step 1. Refrigerant — is made of — Ammonia. Ammonia was one of the first refrigerants.
2. Step 2. Ammonia — is material for — Maser. The first maser ran on ammonia.
3. Step 3. Maser — evolved into — Laser. A laser is an optical maser.
4. Step 4. Laser — is used in — Laser cutting. A laser.
5. Step 5. Laser cutting — uses — CNC machine. CNC.

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