Circular screen: a glass halftone screen having a circular outside frame, to permit screen rotation, for convenient screen Angle selection.
圆网屏：是玻璃制的半色调网屏。它有着可以旋转的圆形外框，方便调换网线角度。
From the Angle of pragmatism, the application of indirect verification proves to be more convenient and economical.
从实用主义角度来说，间接证实的运用比直接证实更方便、更合算。
It is shown that this orientation method for crystals with large optical Angle is convenient, best and valid.
这个在大光轴角厚晶体上进行定向的方法是方便、快速和有效的。
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