适用于多电极管，阴极射线管除外。描述了用于对同类型多电极管的电极进行编号以及为多单元管的单元指定名称的系统。

Applies to multi-electrode tubes, with the exception of cathode-ray tubes. Describes the system used for numbering the electrodes of the same type multi-electrode tubes and for assigning designations to the units of multiple-unit tubes.