DIFF Subgroup
F28C 3/18 the particulate material being contained in rotating drums
Introduced: September 1968
Full Title
Other direct-contact heat-exchange apparatus > one heat-exchange medium at least being a fluent solid, e.g. a particulate material > the heat-exchange medium being a particulate material and a gas, vapour, or liquid > the particulate material being contained in rotating drums
No child classifications to compare. This is a leaf node in both IPC and CPC.