7788: Other elect.machinery and equipment

77881: Electro-magnets, permanent magnets, clamps, vices etc 77882: Elect.traffic control equip.for railways, roads etc 77883: Elect.sound & visual signalling apparatus 77884: Elect.capacitors, condensers, fixed or variable 77885: Particle accelerators and parts 77886: Other elect.appl.having individual functions 77887: Carbon brushes, arc-lamp carbons, carbon electrodes 77889: Elect.parts of machinery and apparatus n.e.s. 7788: Other elect.machinery and equipment