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Operation of the Bisun B21caving light The rotary switch in the headset containing a B21 is used to control both wide and spot beams, in a similar (though slightly more complicated) way to operation with conventional inc
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Document Date: 2012-10-02 11:58:54
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Operation of the Bisun B21caving light The rotary switch in the headset containing a B21 is used to control both wide and spot beams, in a similar (though slightly more complicated) way to operation with conventional inc