Description: Documents that apply to a specific region; Name: assignment of the document to a contry/region
Description: documents which are considered for usage in a certain region; Name: country/region classification 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