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Philadelphia Subway
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 CTC machine at Fairmount Ave. - City of Phila., Ridge Ave. Subway155 views
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 CTC machine at Fairmount Ave. - City of Phila., Ridge Ave. Subway119 views
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 Section of Phila. C.T.C. machine94 views
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 Section of Phila. C.T.C. machine103 views
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 Section of Phila. C.T.C. machine88 views
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 Philadephia C.T.C machine160 views
   
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