Rotation mechanism and computer: what they have in common

1. Step 1. Rotation mechanism — is part of — Rock drill. It rotates the rod between blows.
2. Step 2. Rock drill — has part — Piston. A percussion piston.
3. Step 3. Piston — is part of — Hydraulic cylinder. The piston is moved by liquid.
4. Step 4. Hydraulic cylinder — is part of — Flight simulator. A motion platform.
5. Step 5. Flight simulator — uses — Computer. Modern simulators are computer-based.

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