Description: Quantitative information on the duration of usability in years; Name: life of use
Description: quantitative information relating to the utilization duration in years; Name: Useful life
Description: Speed that characterizes a pump in terms of its speed, flow rate per impeller eye, i.e. total flow for single-flow impeller, half flow for double-flow impeller, at the best efficiency point and head per stage at maximum impeller diameter ; Name: Specific speed