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safety light |
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A spring-tensioned aluminum pole (of two sections) with a holder to hold a
flashlight in a horizontal position with an adjustable screw aligned with
the push button switch of the flashlight. If there is conversion of the
mine roof (back), the adjustment screw will depress, putting on the light
to warn a miner in the area. Sometimes accompanied by a conversion gauge
(measures in thousandths). See also: guardian angel
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