| 摘要 |
Arrangement is intended for fitting over the facia of a control panel built up from modular units to show legends, switching symbols, connection arrows etc. It comprises an (initially fully) transparent plastic, e.g. PVC, sheet, pref. around 1 mm thick, which is provided with the necessary openings and with bores contg. push buttons to secure the sheet using corresponding bores in the (four corner) units. The front face of the sheet may be screen printed in the colours of the corresponding units.
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