Plastic bottle und tunnelling shield: was sie gemeinsam haben

1. Schritt 1. Plastic bottle — nutzt — Injection moulding. Preforms are moulded and then blown.
2. Schritt 2. Injection moulding — nutzt — Hydraulics (Pascal’s law). Hydraulic presses.
3. Schritt 3. Hydraulics (Pascal’s law) — wird verwendet in — Hydraulic cylinder. The liquid transmits pressure to the piston.
4. Schritt 4. Hydraulic cylinder — wird verwendet in — Tunnelling shield. The shield was pushed forward by jacks.

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