photoscope
n. 透视镜;荧光屏
例句
The utility model discloses an electricity meter. A photoscope with the magnification function is installed on a view window at the corresponding position of an indicating dial.
本实用新型公开了一种电表,指示盘的相应位置处的视窗上安装有具有放大功能 的透视镜。