| 摘要 |
The unit has a base body with a clear cover, a base part and a rectangular or polygonal casing (1). The casing contains seals, light sources (8), reflectors (8.1), electric parts, holders and clamp devices. The casing can be mounted on tunnel ceilings, roofs or in free areas and is protected against the ingress of moisture, etc. The casing has at least one curved section in a corner area, which is made from weldable corrosion-resistant sheet metal. The end faces of the curved section by welding to a peripheral sealed side wall without additional materials. An Independent claim is included for a method for manufacturing the unit.
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