Description: probability for an item to be in a state to perform as required at a given instant; Name: immediate Availability
Description: Probability that an item is in a state to perform as required at a given instant, under given conditions, assuming that the necessary external resources are provided ; Name: Instantaneous availability
Description: Number of run cycles between the upper and lower dead centre of the piston movement in a specific time unit; Name: Min. number of strokes per minute for the piston