Plastic bottle body and diesel engine: what they have in common

1. Step 1. Plastic bottle body — is part of — Plastic bottle. An inflatable body.
2. Step 2. Plastic bottle — uses — Injection moulding. Preforms are moulded and then blown.
3. Step 3. Injection moulding — uses — Hydraulics (Pascal’s law). Hydraulic presses.
4. Step 4. Hydraulics (Pascal’s law) — is used in — Hydraulic cylinder. The liquid transmits pressure to the piston.
5. Step 5. Hydraulic cylinder — is part of — Excavator. Hydraulic cylinders move the boom and the bucket.
6. Step 6. Excavator — has part — Diesel engine. The drive is a diesel.

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