Stagecoach and CNC machine: what they have in common

1. Step 1. Stagecoach — evolved from — Carriage. A public coach.
2. Step 2. Carriage — is made of — Leather. The suspension of early carriages was leather straps.
3. Step 3. Leather — is material for — Prosthetic limb. It was attached with leather straps.
4. Step 4. Prosthetic limb — has part — Servomotor. Bionic prostheses have motors.
5. Step 5. Servomotor — is part of — CNC machine. Servo drives move the axes.

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