Thermal control, including rapid thermal response to compensate for temperature perturbations induced by {TAIL ~ periodic introduction} of assay cartridges which are at {HEAD ~ a temperature} less than that of the chamber, is accomplished by heating elements located above and below the conveyor 
Thermal control , including rapid thermal response to compensate for temperature perturbations induced by { TAIL ~ periodic introduction } of assay cartridges which are at { HEAD ~ a temperature } less than that of the chamber , is accomplished by heating elements located above and below the conveyor
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