Hook and eye and CNC machine: what they have in common

1. Step 1. Hook and eye — evolved into — Zip. Judson started with a chain of hooks.
2. Step 2. Zip — is part of — Bag. A zip.
3. Step 3. Bag — is made of — Leather. Leather.
4. Step 4. Leather — is material for — Prosthetic limb. It was attached with leather straps.
5. Step 5. Prosthetic limb — has part — Servomotor. Bionic prostheses have motors.
6. Step 6. Servomotor — is part of — CNC machine. Servo drives move the axes.

Open Evothings