FIELD: gas-filled tanks of switchgear of vacuum switching tubes with operating mechanisms. SUBSTANCE: insulating holder has plastic section resembling flat bath with embracing section matched with external section of operating mechanism of vacuum switching tube; opposing fastening shoulders attached to ends of insulating holder are provided with screw mounts arranged symmetrically relative to longitudinal axis. EFFECT: enlarged functional capabilities of holder requiring no matching to space conditions. 3 cl, 3 dwg
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