Electrodes and electric fan: what they have in common

1. Step 1. Electrodes — is part of — Electrolyser. Nickel electrodes.
2. Step 2. Electrolyser — is made of — Nickel. The electrodes are nickel.
3. Step 3. Nickel — is material for — Turbofan. The hot section is nickel alloys.
4. Step 4. Turbofan — has part — Impeller. A fan.
5. Step 5. Impeller — is part of — Electric fan. A fan's blades are an impeller that pushes the air.

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