Washing machine and cannon: what they have in common

1. Step 1. Washing machine — has part — Shock absorber. Shock absorbers damp the drum's shaking during the spin.
2. Step 2. Shock absorber — works like — Recoil mechanism. The same principle of hydraulic damping.
3. Step 3. Recoil mechanism — is part of — Howitzer. Recoil mechanisms.
4. Step 4. Howitzer — is a kind of — Cannon. An artillery piece.

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