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Switching device for luminous focus, has principal luminous focus or principal load and reserve luminous focus or reservation loads, where both foci are connected in parallel to same energy supply
Switching device for luminous focus, has principal luminous focus or principal load and reserve luminous focus or reservation loads, where both foci are connected in parallel to same energy supply
The device has a principal luminous focus or principal load and a reserve luminous focus or reservation loads. Both foci are connected in parallel to same energy supply. The reserve luminous focus works when the principal luminous focus fails to work.
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