Usage SA3 coupler



other countries extensive usage

 finland, rail transport in finland
 mongolia, rail transport in mongolia
 iraq, iraqi republic railways
 turkey, rail transport in turkey
mauritania railway operated société nationale industrielle et minière
 cameroon, camrail
 gabon, trans-gabon railway (called willison coupler)

some usage

 sweden &  norway (malmbanan/ofotbanen); used exclusively heavy iron-ore trains.
 australia; miniature sa3 used on sugarcane tramways , underground colliery railways.
 slovakia (uzhhorod–košice broad-gauge track); heavy iron-ore transports ukraine.
 poland (broad gauge metallurgy line); longest broad gauge railway line in poland. used freight traffic, iron ore , coal.
 united states willson coupler used in mining , tunneling railroads.




^ http://www.irwincar.com/couplers.php






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