Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: The Brusio spiral viaduct (ma ọ bụ Brusio okirikiri viaduct; Italian: Viadotto elicoidale di Brusio, German: Kreisviadukt Brusio) bụ otu-track itoolu-arched nkume spiral okporo ígwè viaduct.  Ajụjụ: Gịnị bụ aha okporo ụzọ ụgbọ okporo ígwè a na-agba gburugburu?
Brusio spiral viaduct