Unit 12 Transport Phenomena in Process Industry It must be emphasized,however,that while_there 虽然 are similarities between the transport processes,there are also important differences,especially between the transport of momentum (a vector)and that of heat or mass (scalars). Nevertheless,a systematic study of the similarities 尽管如此 between the transport processes makes it easier to identify and understand the differences between them. 鉴别 It must be emphasized, however, that while there 虽然 are similarities between the transport processes, there are also important differences, especially between the transport of momentum (a vector) and that of heat or mass (scalars). Nevertheless, a systematic study of the similarities 尽管如此 between the transport processes makes it easier to identify and understand the differences between them. 鉴别 Unit 12 Transport Phenomena in Process Industry