spillway apron slab spillway capacity spillway channel spillway chute spillway crest spillway crest gate spillway culvert spillway dam spillway elevation spillway face spillway face slab spillway-foundation block spillway gate spillway level spillway lip spillway opening spillway pier spillway tunnel spillway work spin |
spillway apron slab хидр. плоча след преливник Търсената дума е намерена |