| 摘要 |
PURPOSE: A lock and a lock set are provided to enable a user to easily insert a key to a lock at night. CONSTITUTION: A lock(100) includes a ring unit(110) and a main body(120). One end of the ring unit is locked or unlocked with the main body by a key. The main body includes a first identification unit(122) and a second identification unit. The first identification unit is formed on one side of the main body. The second identification unit is formed on the other side of the main body and is different from the first identification unit.
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