For generating a kind of liquid, for example, a medicament an aerosol a sprayer. Equipment includes a perforation element of one or more nozzles, each nozzle with an entrance and one outlet. One driving mechanism makes liquid be driven through one or more nozzles in use, therefore forms a liquid spray with one or more streams of liquid. At least one shock surface is provided to its liquid hammer in use, and jet expansion is located at the shock surface in downstream side.
