| 摘要 |
A heat sink includes a tubular base having longitudinal channels arranged in parallel around the periphery and a first and a second ribs protruding from the periphery and respectively extending along two opposite sides of each of the channels, and radiation fins radially arranged around the tubular base and supported on the second ribs, each radiation fin having an angled foot portion respectively inserted into the channels and secured thereto by the first ribs that are stamped down after the angled foot portions of the radiation fins are inserted into the channels of the tubular base.
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