Focusing eyepiece provides a sharp, easy-to-read scale, which is designed with semi-transparent blue background so you don't have to point the instrument in a certain direction to get your reading.
聚焦目镜提供了一个尖锐的，容易阅读的规模，这是设计的半透明蓝色背景，所以你不需要有指向仪在某一个方向使您读。
Focusing eyepiece provides a sharp, easy-to-read scale, which is designed with semi-transparent blue background so you don't have to point the instrument in a certain direction to get your reading.
聚焦目镜提供了一个尖锐的，容易阅读的规模，这是设计的半透明蓝色背景，所以你不需要有指向仪在某一个方向使您读。
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