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| Keywords: Hales's ventilating bellows.jpg en Dr Hales's ventilating bellows fr Schéma de principe du ventilateur du Docteur Hales http //books google fr/books id AOgOAAAAYAAJ pg PA207 dq Stephen+Hales+ventilateur lr ei 7ZynScmuMqeGzgT62LjhDg PPA208 M1 Dr Hales 1742 PD-old-100 Ventilation Stephen Hales | ||||
