Introduction to Spectrometer

What is a spectrometer? A spectrometer is also called a spectrometer. A device for measuring the intensity of different wavelength positions of the spectral line with a photodetector such as a photomultiplier tube. Its structure consists of an entrance slit, a dispersion system, an imaging.......

High voltage insulator classification and use

Insulators can be classified into high voltage insulators and low voltage insulators according to the voltage used. Insulators can be divided into porcelain insulators, glass insulators, and organic material (epoxy-resinated) insulators according.......

This autumn and winter with acne said byebye

Autumn and winter annoying acne, large pores and other issues also swarmed, making people more depressed. How to easily get rid of acne annoyance, and offer the perfect anti-acne secret in winter, so that you have instant flawless smooth muscle. Refused to do "pox flower girl", se.......