Description: accumulated span of uptime from the object's initial startup or from recovery to failure; Name: uptime to failure
Description: Operating time accumulated from the first use, or from restoration, until failure ; Name: Operating time to failure
Description: pump h(q) curve where the maximum head (peak point) and shut-off head are not coincidental, or the total head does not decline continuously as the rate of flow increases; Name: stable pump H(Q) curve