I

telecommunication apparatus and instruments, namely, lasers not for medical use, modulators, amplifiers, filters, and electrooptical switches; optical switches; optoelectronics apparatus and instruments, namely, semiconductors, passive wave guides, detectors, and integration components therefor, lasers not for medical use and laser arrays, optical fibers, optoelectronic chips, and parts therefor

repair, maintenance and installation of telecommunication apparatus and instruments, namely, lasers not for laboratory use, modulators, amplifiers, filters, and electrooptical switches; optical switches; repair, maintenance and installation of optoelectronics apparatus and instruments, namely, semiconductors, passive wave guides, detectors, and integration components therefor, lasers not for laboratory use and laser arrays, optical fibers, optoelectronic chips, and parts therefor