| 摘要 |
A lock includes a housing, a first cylinder positioned in the housing, and a second cylinder positioned in the housing and located in an inner side of the first cylinder. The housing includes two annular positioning grooves defined in an inner periphery thereof for positioning the first and second cylinders. The housing further includes a plurality of pin tumbler assemblies respectively received in pin tumbler holes in an outer periphery thereof. The first cylinder includes a keyhole and a plurality of pin tumbler holes. The second cylinder includes a keyhole aligned with the keyhole of the first cylinder and a plurality of pin tumbler holes. Each pin tumbler hole of the housing is aligned with an associated one of the pin tumbler holes of the first and second cylinders.
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