The various periods of time should be differentiated from one another on the record by differences in the thickness of the relevant traces, or by any other system of at least equal effectiveness from the point of view of legibility and ease of interpretation of the record.
Ba cheart na tréimhsí ama éagsúla a idirdhealú óna chéile ar thaifead na ndifríochtaí i dtiús na rianta ábhartha, nó trí chóras ar bith eile atá ar a laghad chomh éifeachtach leis ó thaobh na hinléiteachta agus ó thaobh a éasca is atá sé an taifead a léirmhíniú.