Public domain
Compressors. Throughout plants of this type gaseous products frequently have to be compressed and cooled in what are called "heatexchangers." In the cycle of reaction, the pressure drops and it must be compressed and cooled.
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Credit lineCompressors. Throughout plants of this type gaseous products frequently have to be compressed and cooled in what are called "heatexchangers." In the cycle of reaction, the pressure drops and it must b. 1935-01-01. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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