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Autocarro STCP Porto. en MAN NL Caetano CNG bus at Praa da Liberdade Porto Portugal de MAN NL Caetano CNG bus am Praa da Liberdade Porto Portugal pt MAN NL Caetano CNG autocarro na Praa da Liberdade Porto Portugal Own Manuel de Sousa public domain Buses in Porto MAN NL MAN NL xxF Caetano buses CNG buses in Portugal January in