Forklift and petri dish: what they have in common

1. Step 1. Forklift — has part — Hydraulic cylinder. Lifting the forks.
2. Step 2. Hydraulic cylinder — is part of — Concrete pump. Hydraulics.
3. Step 3. Concrete pump — uses — Concrete. It pumps concrete.
4. Step 4. Concrete — is material for — Sewage treatment plant. The tanks are concrete.
5. Step 5. Sewage treatment plant — uses — Culture medium (agar). Waste water is cleaned by activated sludge — bacteria.
6. Step 6. Culture medium (agar) — uses — Petri dish. Agar in dishes.

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