Evaporator coil and lead–acid battery: what they have in common

1. Step 1. Evaporator coil — is part of — Ice machine. It cools the moulds.
2. Step 2. Ice machine — uses — Refrigerant. A refrigerant.
3. Step 3. Refrigerant — is material for — Air conditioner. Inside is a refrigerant.
4. Step 4. Air conditioner — is part of — Data centre. Cooling.
5. Step 5. Data centre — has part — Uninterruptible power supply. Backup power.
6. Step 6. Uninterruptible power supply — has part — Lead–acid battery. A battery.

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