71548531
Jan 31, 1948
Feb 28, 1950
DUST AND FUME COLLECTORS, ABSORBERS, AND ATMOSPHERIC COOLERS, SUCH COLLECTORS, ABSORBERS, AND COOLERS CONSISTING OF TOWERS THROUGH WHICH A GASEOUS MEDIUM IS PASSED COUNTERCURRENT TO THE FLOW OF LIQUID BY WHICH THE REMOVAL OF DUST AND FUMES OR THE ABSORPTION OF MATERIAL ON THE COOLING OF AIR IS ACCOMPLISHED
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