Hydraulic fracturing und tunnelling shield: was sie gemeinsam haben
- Schritt 1. Hydraulic fracturing — nutzt — Hydraulics (Pascal’s law). Fluid pressure.
- Schritt 2. Hydraulics (Pascal’s law) — wird verwendet in — Hydraulic cylinder. The liquid transmits pressure to the piston.
- Schritt 3. Hydraulic cylinder — wird verwendet in — Tunnelling shield. The shield was pushed forward by jacks.