More specifically, {HEAD ~ the invention} relates to direct contact heat exchange devices and {TAIL ~ methods} which produce a cooled homogeneous fluid stream from a mixture of hot fluids and cooler gases within a multi step reaction bed device and process 
relates to
More specifically , { HEAD ~ the invention } relates to direct contact heat exchange devices and { TAIL ~ methods } which produce a cooled homogeneous fluid stream from a mixture of hot fluids and cooler gases within a multi step reaction bed device and process
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