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