Air intake collar and kiln: what they have in common

1. Step 1. Air intake collar — is part of — Bunsen burner. It regulates the air intake.
2. Step 2. Bunsen burner — uses — Natural gas. Gas.
3. Step 3. Natural gas — uses — Pipeline. Gas is transported through pipes.
4. Step 4. Pipeline — is part of — Chemical plant. Pipelines between the vessels.
5. Step 5. Chemical plant — is made of — Brick. The furnaces and towers are brick.
6. Step 6. Brick — uses — Kiln. Fired brick is stronger than mud brick.

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