FR431E - Système d'appareil continu de distillation, rectification, épuration et concentration à multiple effet et sous pression réduite
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Système d'appareil continu de distillation, rectification, épuration et concentration à multiple effet et sous pression réduite
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FR431D1901-11-051902-04-29Système d'appareil continu de distillation, rectification, épuration et concentration à multiple effet et sous pression réduite
ExpiredFR431E
(fr)
Improvements in Vacuum Apparatus for Drying, Distilling, Concentrating, and other like Purposes, and in the Method of and Means for Obtaining and Maintaining Vacuum therein.