Halogen gas filling and paper machine: what they have in common

1. Step 1. Halogen gas filling — is part of — Halogen lamp. Iodine or bromine returns tungsten to the filament.
2. Step 2. Halogen lamp — is made of — Tungsten. Tungsten.
3. Step 3. Tungsten — is material for — Cemented carbide. Tungsten carbide.
4. Step 4. Cemented carbide — is material for — Tunnel boring machine. The cutters are cemented carbide.
5. Step 5. Tunnel boring machine — has part — Conveyor belt. Spoil is removed by a conveyor.
6. Step 6. Conveyor belt — works like — Paper machine. Fourdrinier’s endless wire mesh moves like a conveyor belt, forming the web of paper.

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