Description: group of related goods produced by the same company under the same brand. ; Name: product family
Description: 2nd level of a 3 level manufacturer specific product hierarchy; Name: Manufacturer product family
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