The development of the ion exchange resins required not only a very extensive laboratory study previous to their ... There are few processes, whether boiler feed water, municipal supplies, chemical plants, etc., that do not require feed ... Manually operated control has, for economically run processes, been entirely replaced by. automatic recording ... Oct. 1, 1947, pages 1211. ... Answers to questionary.
|Title||:||Corrosion and Material Protection|