Posted by Tom on September 20, 2020 
Interesting photo, Dave. Especially to a non-railroader, but follower. Please explain what "repeater" means.
Posted by Dave Schauer on September 20, 2020 
Tom - these cars have air compressors that help maintain air pressure in the train braking system when it is very cold out, typically below zero when air leaks become more common.
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