Description: Characterization of a document in terms of the purpose or information it contains; Name: Document type
Description: classification of a document according to its purpose or the information it contains; Name: type of document
Description: translation i of a pair of gears or a multiple gear pair is the ratio of the angle speed wa (or the speed na) of the first driving wheel to that of the last driven wheel wb (or nb); Name: Transmission ratio of the transmission