… treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, …
Explanatory notes
… following types, viz., in the form of : (i) Concentric tube systems : one fluid flows in the annular interval, the other in the central tube. (ii) A tubular system for the one fluid, enclosed in a chamber … Immersion coils consisting of an assembly of plastic tubes, placed in parallel or braided, and sealed at each end …