By using latest special mechanism design, SME-30 use the hydrodynamic water fragmentation，producing very fine water mist，with the speed of sound (360m /s) to form a strong momentum jet to the nozzle and form a continuous energy field on the top of nozzle，crushing the dirt on the surface or internal of Nozzle，during the cleaning process the cleaning liquid ( DI water) can be achieved automatic direct emissions, not need cleaning solvent at all.