| 摘要 |
An ATCA card assembly, which includes a rear transition module mounted on and electrically connected to a circuit board and having an electric connecting portion at one side, a holder frame mounted on the rear transition module to hold multiple hard disk drives in a stack, and an adapter, which has an adapter board affixed to the circuit board and front mounting lugs of the holder frame to secure the holder frame in place, and electrical connectors extending from the adapter board at different elevations and respectively connected to the electric connecting portion of the rear transition module and the hard disk drives.
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