material measure - a measuring device which reproduces, in a permanent manner during its use, one or more known values of a defined quantity, material measures of length hereinafter called "measures of length" are instruments comprising scale-marks whose distances are given in legal units of length, materiaalmõõt - mõõtevahend (füüsikalise) suuruse ühe või mitme väärtuse püsivaks reprodutseerimiseks või esitamiseks