disque à structure ouverte

OBS: structure : Tassement des grains d'abrasif sur leur support, désigné par un numéro.
OBS: disque à structure ouverte : terme uniformisé par le Comité du projet de lexiques (Nouveau-Brunswick).

CONT: All abrasive papers, regardless of size and type of mineral used, fall into two categories : open- and closed-coat. These terms refer to the spacing of the abrasive particles. On open-coat paper, only 60 to 80 percent of the backing is covered with grit ... Closed-coat discs are used after the metal finishing operation is completed ... Open-coat discs ... are better for removing paint.
OBS: open-coat disc: term officially approved by the Lexicon Project Committee (New Brunswick).