| 摘要 |
A removable door locks a removable modular unit into place within a computer case. The computer case includes a first opening and a second opening. The door fits into the first opening. The modular unit fits into the second opening to be positioned, when inserted, adjacent to the door. The door has a protrusion extending into the first opening toward the modular unit. The door is inserted within the first opening in either a first orientation or a second orientation. When inserted in the first orientation, the protrusion extends into a recess within the modular unit blocking removal of the modular unit. When inserted in the second orientation, the protrusion still extends into the first opening, but does not mate to the recess. Thus, the modular unit is not blocked by the protrusion and can be removed from of the computer case through the second opening.
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