Description: Period of time during which an item performs its intended function, it includes all the time a machine is continuously running from start-up until it is shut down.; Name: ot
Description: passed time period after comissioning of a system, sub-system, component or piping; Name: Operating time 
Description: Number of run cycles between the upper and lower dead centre of the piston movement in a specific time unit; Name: Max. number of strokes per minute for the piston