Unit Definition (douzieme [print]) The douzième is a traditional unit of distance used in watchmaking. The word is French for "twelfth," and a douzième is equal to 1/12 Swiss ligne, about 188 micrometers (microns) or 7.4 mils.
Unit Definition (micromicron) Picometer: a metric unit of length equal to one trillionth of a meter.
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