2530-99-763-5290

3439-01-617-4803 3439016174803 016174803 is an item of electrically conductive material which acts as a terminal through which an electric current enters or leaves a liquid or gas. the item does not provide filler material or act as a lighting media. excludes electrode, welding; electrode, cutting, tubular and electrode, carbon, lighting.

5965-22-617-4803 5965226174803 226174803 is a loudspeaker whose diaphragm movements are produced by a coil or iron armature moving in the field of a permanent magnet.

5960-00-617-4803 5960006174803 006174803 is an inclosure, including two or more electrodes, in which a flow of electrons may occur through a vacuum or a contained gas. the electronic conduction takes place either by means of electrons emitted from a cathode or by ionization of the contained gas. includes phototubes (photoemissive type only), geiger-mueller tubes, traveling wave tubes, cathode ray tubes and microwave tubes (klystron, magnetron, or the like). excludes items whose primary purpose is to produce light energy. also excludes photoelectric cell; and semiconductor device (as modified).