ARRANGEMENT AND PROCESS FOR TREATING A SURFACE

摘要

An apparatus and method for treating a surface with a jet comprising a multiplicity of particles, the apparatus including at least one nozzle unit, which is designed for providing a stream of propellant gas mixed with a multiplicity of particles, and an enclosure of the nozzle unit, the enclosure being arranged at such a distance from the nozzle unit that a gap is formed between the nozzle unit and the enclosure.