Cześć,
Potrzebuje potwierdzenia, że dobrze rozwiązałem poniższe 2 zadania. Proszę o sumienne rozwiązanie. Rozwiązania niekompletne i/lub błędne będą zgłaszane.
Potrzebuje potwierdzenia, że dobrze rozwiązałem poniższe 2 zadania. Proszę o sumienne rozwiązanie. Rozwiązania niekompletne i/lub błędne będą zgłaszane.
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2. Eye protection must be worn.
3. This extinguisher must not be removed!
4. This machine must be switched off before servicing.
5. Spillages must be cleaned up.
6. Vehicles must not be unloaded here!
1. A number of methods is used by the Construction Engineers to make tunnels.
2. For shallow tunnels, a simple cut-and-cover method is employed by them.
3. Explosives are used by them for tunnels in very hard rock.
4. A tunnel-boring machine (TBM) is used by them to make deep tunnels in soft rock.
5. Workers and machinery are protected by the TBM.
6. The rock is cut by a rotating cutterhead at the front.
7. The refuse is removed by machinery at the rear.
8. The TBM is pushed forward by hydraulic jacks.
9. A new tunnel ring is built every 1.5-2 metres by the segment erector.
10. Concrete segments are placed in the right position by it to form the ring.