EMD AEM-7 MARC #4902 (cliff1066) Tags: railroad electric train washingtondc centennial dc washington track diesel rail railway loco steam caboose amtrak railcar marc 100th locomotive boxcar unionstation engineer booster buffer bogie coupler railstation amtrac rollingstock alco mainline emd gennie aem7 shunt americanlocomotivecompany aunit electricloco sw1000r unionstationcentennial
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