Description: Period of time from the commissioning of a plant, part of a plant, a component or a line system; Name: service life
Description: passed time period after comissioning of a system, sub-system, component or piping; Name: Operating time 
Description: indication of the minimum flow rate at which the pump can still be operated without problems. related to pump operation at 2,900 rpm; Name: minimum feed flow at 2900 / min