| 摘要 |
The invention concerns marking means for noting the working voltage of an electrical connection element (2; 4), mounted on an accessory or support (3; 5), characterised in that it is in the form of at least a coloured ring (9a, 9b) arranged to be inserted between the connection element (2;4) and its support (3; 5), at least one of the ring dimensions in diametrical direction being not smaller than the corresponding dimensions of the connection element (2; 4) and/or its support (3; 5) at their interface so as to have an annular peripheral display surface (11a, 11b) which, at least partly, is flush with or projects from said connection element and/or its support.
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