Desc:In life, there are too many light sources will produce harmful light, especially the sun; There are three kinds of light emitted from sunlight: visibl...
Desc:General Introduction:An objective lens is a lens group composed of several lenses. The purpose of combination is to overcome the imaging defects of a ...
Desc:General Introduction:An objective lens is a lens group composed of several lenses. The purpose of combination is to overcome the imaging defects of a ...
Desc:Product DescriptionIt has physiological inertia, good chemical stability, electric edge and weather resistance, wide viscosity range, low setting poin...