Bloomery and typewriter: what they have in common

1. Step 1. Bloomery — has part — Bellows. Bellows blew in air for a high temperature.
2. Step 2. Bellows — is part of — Pipe organ. Bellows supply the air.
3. Step 3. Pipe organ — has part — Keyboard. Manuals were the first keyboards.
4. Step 4. Keyboard — is part of — Typewriter. The keys drive levers with type.

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