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Quanto resiste un filo di acciaio ad “alta resistenza”? E quali sono le sue applicazioni pratiche? Abbiamo seguito un test scientifico in una vecchia miniera a picco sul Walensee, nel canton San Gallo, per capire come gli ingegneri riescono a fermare i massi in movimento e a proteggere le zone abitate da frane e colate detritiche.
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