Audiovisual teaching apparatus, namely, photographic slides, framing apparatus for slides, slide projectors, slides frames; cleaning devices for sound recording discs; blank discs, compact discs audio-video, magnetic discs, optical discs, CD-roms, floppy discs, sound recording strips, sound recording carriers, magnetic tape; pre-recorded discs, compact discs audio-video, magnetic discs, optical discs, CD-roms, floppy discs, sound recording strips, sound recording carriers, magnetic tape recor...