Scientific, optical, measuring, signaling, and control devices and instruments, in particular coordinate measuring machines and electrical signal attenuators; optical glass; measuring glassware, in particular glass scales; optical media, in particular blank compact discs; fiber-optic cables; optical fibers; optically active fibers; fiber lasers, not for medical purposes; fiber-optic amplifiers; optical fibers, in particular structural fiber-optic components and modules; planar waveguides; int...