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1. An LED circuit board, comprising at least two circuit boards and an insulation board arranged between two adjacent circuit boards; electronic components are loaded on said at least two circuit boards; said at least two circuit boards comprises a first circuit board disposed above the insulation board and a second circuit board disposed below the insulation board; the insulation board is provided with two connecting holes arranged symmetrically and a holding column arranged between the two connecting holes for convenience of holding; the first circuit board is provided with a through hole passing through the first circuit board at a position corresponding to the holding column; the second circuit board is provided with two connecting columns extending upwards at positions corresponding to the two connecting holes, and the two connecting columns are detachably inserted in the two connecting holes respectively; the holding column is detachably inserted in the through hole; the insulation board is made of fire-retardant and fire-resistant plastic material.
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