檢流計，電流計一種儀器，用以探測、測量和測定微小電流方向，采用線圈在磁場中產(chǎn)生的機械效果的方法 An instrument used to detect, measure, and determine the direction of small electric currents by means of mechanical effects produced by a coil in a magnetic field.
小型的或微小的尺寸很小或尺寸縮得很小的 Being on a small or greatly reduced scale.
一種需要經(jīng)過放大才可閱讀的微小圖象。 An image that is too small to be read without magnification.
