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Perfectionnements apportés à l'établissement des chaudières destinées au chauffage central par circulation de vapeur à basse pression, ou par circulation d'eau chaude
Procédé d'obtension d'hydrocarbures légers, en partant de composés organiques complexes, par action simultanée de la chaleur, d'hydrogène sous pression, et de catalyseurs déshydratants