Description: time-related proportion within a given period during which an object was able to perform when required; Name: Time-related availability
Description: During a given period of time, percentage of the time during which an item was able to perform when required ; Name: Time based availability
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