Willow rods and turbine: what they have in common

1. Step 1. Willow rods — is material for — Basket. Flexible willow or vine rods.
2. Step 2. Basket — is made of — Plant fibre. Grasses and bast fibres were also used for weaving.
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 — Turbine. The bladed wheel is the turbine’s rotor.

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