7 Ultrasonic apparatus, in the nature of components made of plastic materials, ceramics and/or metal for radiating oscillations as parts of machines for the liquid cleaning of objects, namely, ultrasonic generators, rod oscillators, transducers, sonotrodes, electrodes, converters, boosters, and insulating tubes; ultrasonic cleaning apparatus, namely, electro-mechanical apparatus comprising at least one component capable of oscillation for producing ultrasonic waves and parts of such apparatus, in particular rod oscillators; current/voltage generators for the excitation of ultrasonic oscillators and parts of such apparatus; machines for the disintegration of sewage sludge; electrical ultrasonic cleaning equipment, namely, transducers for transferring ultrasonic waves into a cleaning fluid; ultrasonic welding and cutting apparatus for ultrasonic cutting, ultrasonic beading, riveting, punching, curved milling, eroding, dispersing, locking, embedding, laminating, perforating, embossing; ultrasonic generators; ultrasonic oscillating systems for producing ultrasonic waves for use in cleaning, welding and cutting and disintegrating bio-mass; plate oscillators, immersion oscillators, rod oscillators, ultrasonic reactors, ultrasonic welding components, namely, holders for ultrasonic welding and cutting work pieces; ultrasonic multi-frequency module generators; ultrasonic module generators for ultrasonic equipment; high-temperature ultrasonic rod oscillators for use in producing ultrasonic waves; ultrasonic welding machines; ultrasonic oscillating units comprising components made of plastic materials, ceramics and/or metal, namely, rod oscillators, sonotrodes, electrodes, converters, boosters, and insulating tubes; ultrasonic mounting-rail generators; electro-mechanical apparatus comprising at least one component capable of oscillation for the production of ultrasonic waves and parts of such apparatus, in particular rod oscillators, transformer pieces, sonotrodes, converters, boosters; ultrasonic generators, namely, electro-mechanical apparatus comprising at least one component capable of oscillation for the production of ultrasonic waves and parts of such apparatus