Description: delivery head of a pump that can deliver it at a minimum without suffering any damage; Name: minimum permitted head
Description: Minimum permissible head at which the pump can be operated without suffering damage; Name: Minimum allowable head
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