Description: the time after commissioning; Name: operation time
Description: passed time period after comissioning of a system, sub-system, component or piping; Name: Operating time 
Description: The operating underpressure PS2- is the maximum value of the operating underpressure defined from a safety point of view by the manufacturer of the system for the various components in relation to the atmospheric pressure (1 bar) at the maximum permissible temperature TS2; Name: Max. permissible underpressure PS2- at TS2, room2