| 摘要 |
A mailbox system includes more than one mailbox wall that defines a compartment with an open end, a lid that rotates from an open position to a closed position to enclose the open end of the compartment, an axle with a first end and a second end that passes through the mailbox wall, a flag attached to the first end of the axle outside of the compartment, an arm attached to the second end of the axle inside the compartment, and a locking bar that moves forward to release the arm such that the flag rotates from a lowered position to a raised position. |
