| 摘要 |
A warning lamp such as is used in certain installations, for example pumping plants, in order to signal an operating defect, whereby the electric light (11) which is switched on in the event of a defect, together with the surrounding transparent and if necessary coloured protection casing (12), which are in a rest position to protect the delicate components from external damage, can in the case of an alarm be brought into the operational position where a sufficient light emission from the alarm light is ensured.
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