FIELD: metal coatings. SUBSTANCE: channel is made in cathode basis having dielectric material regions on its both sides extended from its vertical edges and located at the level of contact with basis of separators for detaching upper edges of deposited zinc. The channel is located at the level of dielectric material regions. Inside the channel, a flat dielectric material part is placed with thickness equal to that of basis. Surfaces of the part are coplanar with surfaces of basis. The part and channel are provided with means preventing displacement of part in any direction. EFFECT: improved design. 3 cl, 6 dwg
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