Fasali na kayan ƙarfe

The models of American standard rails are divided into four types: 85, 90, 115, 136. These four models are mainly used in railways in the United States and South America. Bukatar a Amurka da Kudancin Amurka suna da fadi sosai.
Fasali na Rails:
Tsari mai sauƙi ba tare da ingancin rashin daidaituwa ba
Sosai karfi
Rails suna da dogon rayuwa
Girma mai yawa na aikace-aikace
Koyaya, ya kamata a lura cewa layin dogo na Amurka yana da kunkuntar ƙasa kuma yana sauƙin lalacewa. Sabili da haka, waɗanda ke cikin Amurka da Kudancin Amurka ana amfani dasu a cikin hanyoyin jiragen ƙasa da jiragen ƙasa.