OptionalnHow many slot lengths were folded.
OptionalstrengthHow closely the lengths keep the period, from 0 where they scatter to 1 where every one falls on the comb: the mean resultant length of the lengths folded onto it. A period found weakly is the result of a search all the same; the belief it is stated with says how far it is held to be the machine's step.
The unit of measurement.
The measured value.
The step by which the perforator moved the paper on, read as the period the lengths of the slots keep: a slot is the punch together with a whole number of steps, so its lengths fall on a comb of this spacing.
See
crm:E54 Dimension