国产精品视频一区二区三区四,亚洲av美洲av综合av,99国内精品久久久久久久,欧美电影一区二区三区电影

Practical, reliable and economical for school use

When used for five hours a day, the power LEDs have a service life of around 25 years and cause no maintenance costs

7- way LED illumination

Provides incident, oblique and transmitted light for high quality illumination and contrast of any application

Bright LED illumination

Saves time and cost of replacement bulbs

4.4:1 Zoom

Zoom magnification from 8X – 35X provides high resolution images

Greenough optical system

For 3D view of sample