Rezumat
In a paper the outcomes of research electric-spark precision forming of details in usual water from a water pipe are resulted. Affirms that the electric spark machining in water without appearance of any electro- chemical processes and corrosion of surfaces is possible only at observance of particular conditions. It is established that usage of bipolar voltage pulses is necessary, but not by a sufficient condition. It is necessary, that alongside with equality of areas of positive and negative voltage pulses, the amplitude of a positive voltage pulse was, at all events, twice more negative, and the shape of a positive voltage pulse was close to rectangular. The groundlessness of announcement of the foreign experts affirms, that a clipping of circuits with small geometric primitives by a wire diameter < 0,1 mm in water and precise processing should be carried out in a hydrocarbon fluid (oil or kerosene), and in water less precise operations can be manufactured only.