Warp beam and electric fan: what they have in common

1. Step 1. Warp beam — is part of — Loom. A beam with the warp threads.
2. Step 2. Loom — uses — Plant fibre. Cloth is woven from threads spun from fibres.
3. Step 3. Plant fibre — is material for — Carpet sweeper. The brush is bristle.
4. Step 4. Carpet sweeper — evolved into — Vacuum cleaner. The mechanization of cleaning.
5. Step 5. Vacuum cleaner — has part — Impeller. An impeller creates the suction.
6. Step 6. Impeller — is part of — Electric fan. A fan's blades are an impeller that pushes the air.

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