Scientific, optical, measuring, signalling and control apparatus and instruments, namely, coordinate measuring machines and electrical signal attenuators; optical glasses; measuring glasses, namely, glass graduated scales; optical media, namely, blank compact discs; optical fibre cables; optical fibers; optical active fibers; fiber laser not for medical purposes; fiber optic amplifier; optical fibers, namely, structural fiber optic components and modules; planar waveguides; integrated optics ...