Muasasat mutakhasisat fi'aemal almuqawalat walhulul alhandasiat nuqadim khadamatina biahtirafiat wajawdat ealiat fi Jimi'anha'almamlakati aemal alhafr bijamie'anwaeiha. Sanad aljawanib (Shoring) lilmasharie wal'iinsha'ati. alrashu alkharsaniu (Shotcrete) wafq'aelaa maeayir aljawdati. aemal almisahat almutatawirat biastikhdam'ahdath altiqniaati altaayirat bidun tayaar (Drone)