Bicycle wheel and air conditioner: what they have in common

1. Step 1. Bicycle wheel — has part — Pneumatic tyre. The tyre softens bumps and improves grip.
2. Step 2. Pneumatic tyre — is part of — Electric car. An electric car’s wheels have pneumatic tyres.
3. Step 3. Electric car — has part — Inverter. An inverter powers the traction motor.
4. Step 4. Inverter — is part of — Uninterruptible power supply. An inverter.
5. Step 5. Uninterruptible power supply — is part of — Data centre. Backup power.
6. Step 6. Data centre — has part — Air conditioner. Cooling.

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