Endoscope and lathe: what they have in common

1. Step 1. Endoscope — is part of — Surgical robot. An endoscopic camera.
2. Step 2. Surgical robot — has part — Servomotor. Servo drives.
3. Step 3. Servomotor — is part of — 3D printer. Stepper motors.
4. Step 4. 3D printer — has part — Lead screw. The axes are moved by screws.
5. Step 5. Lead screw — is part of — Screw-cutting lathe. The lead screw moves the cutting tool.
6. Step 6. Screw-cutting lathe — evolved from — Lathe. Maudslay added a lead screw and a slide rest.

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