Electric arc furnace and programmable logic controller: what they have in common

1. Step 1. Electric arc furnace — has part — Graphite. Graphite electrodes.
2. Step 2. Graphite — is material for — Anode (graphite). The anode of a lithium-ion battery is graphite.
3. Step 3. Anode (graphite) — is part of — Fuel cell. An anode with a catalyst for hydrogen.
4. Step 4. Fuel cell — uses — Catalysis. A platinum catalyst.
5. Step 5. Catalysis — is used in — Chemical plant. Catalysts.
6. Step 6. Chemical plant — has part — Programmable logic controller. Process control automation.

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