Didot point system: A conventional system of type measurement used in continental Europe .

欧洲大陆惯用的字体制。

Line gauge: Measuring ruler used for copyfitting and measuring type . Also called Type gauge.

字体大小和配稿用尺。亦称字尺。

Opacimeter: Instrument for measuring the opacity of paper and expressed it as a percentage.

纸张不透明并以百分率表示的仪。

ROLL is the instantaneous value of the angle between the reference plane and the horizontal, measured in an athwartship vertical plane.

横摇以从左到右通过舰身的垂直面，参考面与水平面之间所形成的。