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: The course of the motor shaft-related section modulus (load moment) of the work machine dependent on the speed; Name: Load moment of the drive