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THC 2003.902.232 Tapping Slag from Experimental Blast Furnace photo
大約 2 年
THC 2003.902.107 Tapping Slag from Experimental Blast Furnace photo
THC 2003.902.119 T. Hignett Control Instruments of the Blast Furnace photo
THC 2003.902.127 T. Hignett Optical Pyrometer photo
THC 2003.902.122 Ore Crushing Machinery photo
THC 2003.902.318 Women workers Group portrait photo
THC 2003.902.021 E. H. Johnston Ozone Production photo
THC 2003.902.064 Compressors photo
THC 2003.902.170 Measuring Vapor Pressures photo
THC 2003.902.019 E. C. White Apparatus for Analysis photo
THC 2003.902.020 J. F. Shultz Investigation of Phosphine photo
THC 2003.902.155 E. P. Bartlett Apparatus for Compressibility of Gas photo
THC 2003.902.037 Shaking Machine photo
THC 2003.902.036 Determining Hygroscopicity photo
THC 2003.902.070 Silica Gel Adsorber for NO2 photo
THC 2003.902.032 Thermostated Agitating Device L. Pinck photo
THC 2003.902.038 Stirring Machine photo
THC 2003.902.069 Colorimeter for NO2 Analysis photo
THC 2003.902.052 Electrolytic Cells for Hydrogen Production photo
THC 2003.902.105 Fixed Nitrogen Research Laboratory Exterior photo