Mountain bike and air conditioner: what they have in common

1. Step 1. Mountain bike — has part — Suspension fork. A suspension fork.
2. Step 2. Suspension fork — has part — Shock absorber. A shock absorber.
3. Step 3. Shock absorber — is part of — Washing machine. Shock absorbers damp the drum's shaking during the spin.
4. Step 4. Washing machine — is a kind of — Household appliance. A household appliance.
5. Step 5. Household appliance — includes — Air conditioner. A household appliance.

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