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1. A novel cooling apparatus, comprising: a mainboard, a cooling fan, a heat sink, provided on the mainboard and affixed to one end of a vent of the cooling fan; the heat sink comprises: a groove, used for accommodating a heat-generating component provided on the mainboard; cooling fins, distributed within the heat sink and arranged on two sides of the groove; wherein a venting and cooling channel is constituted between an interior of the heat sink and the vent of the cooling fan; a cooling unit; wherein a pair of the cooling units are fixedly connected by a connecting part, a top of the heat sink is provided with a sliding groove along a horizontal direction, the connecting part is equipped with a slider structure matching the sliding groove, and a sliding fixation is formed between the slider structure and the sliding groove; and wherein the cooling units are provided with recesses opposite to each other, the recesses are provided with a hook-like structure inside the end of the recesses, a pair of the recesses constitutes a structure of the sliding groove, the slider structure comprises a fixed bar disposed vertically and a fixed plate disposed horizontally, an end of the fixed plate is provided with a clamping structure reversely matched to the recesses.
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