Water purification system,dating back to third century BC. Filtering material is contained within the tubes. Water passes through the filter and is then collected for consumption. Photographed in Empurieus,Spain | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
Bildgröße: | 4168 px × 4207 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |