3D spectacles; electrical adapters; accelerometers; accumulators, electric; ear pads for headphones; remote control apparatus for controlling underwater unmanned submersibles; data processing apparatus; audio- and video-receivers; audiovisual teaching apparatus, namely, multimedia projectors, computers; audio interfaces; beacons, luminous; balancing apparatus; batteries, electric; electric and electronic effects units for musical instruments; computer memory devices; measuring instruments, na...