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Artificial SilkSynthetic Nitrogen IndustrySulphuric AcidIdentification of GoldPolluted Drinking WaterPotassium MetabisulphitePreservation of FishAluminum MetallurgyLinen TextilesThermodynamic FeaturesProduction StatisticsSynthetic AmmoniaHydrogen-Ion ConcentrationCellulose XanthateConcentrated Sulphuric AcidWaste Heat UtilizationMetallurgical ProcessesChemical ManufacturingTrisodium PhosphateBoiler Feedwater