FIELD: electrical engineering.
SUBSTANCE: coil ensures simultaneous treatment of two or more bodes of (1) tubular items the treatment area (11) whereof is ring-shaped; the items are made of an electrically conductive material and in every case take over the conjugated element clamping area (21). The coil consists of a pulsing current source (4) and an electric conductor (3) connected to the latter and encompassing all the bodies within the treatment area. The electric conductor has a U-shape, its both sides (31), positioned opposite each other in every case, having at least one indent each (32). The inner edges (33) of the both indents (that are opposite each other) have an additional shape, at equal distance increased towards the external end of each body cross-section. On the both parts inner sides at least the indents are covered with an electrically insulating layer.
EFFECT: tubular items treatment cheapening and simplification.
29 cl, 4 dwg
