Computing device and rock drill: what they have in common

1. Step 1. Computing device — includes — Tide-predicting machine. An analogue calculator.
2. Step 2. Tide-predicting machine — has part — Pulley. Pulleys add up the harmonics.
3. Step 3. Pulley — is part of — Belt drive. The belt wraps around pulleys.
4. Step 4. Belt drive — is part of — Supercharger. Belt-driven from the crankshaft.
5. Step 5. Supercharger — uses — Compressed air. It forces air into the cylinders.
6. Step 6. Compressed air — is used in — Rock drill. Pneumatics.

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