Bellows nozzle and pneumatic tube: what they have in common

1. Step 1. Bellows nozzle — is part of — Bellows. It directs air into the forge.
2. Step 2. Bellows — has part — Valve. A valve in the bellows lets air in when they open and keeps it from escaping back.
3. Step 3. Valve — is part of — Ventilator. Valves.
4. Step 4. Ventilator — has part — Compressor. A compressor or turbine.
5. Step 5. Compressor — is part of — Pneumatic tube. A pressure or vacuum blower.

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