| 摘要 |
The popup plunger has an offset connector at its lower end cooperable with the end of a ball-mounted lever. In one mode of connection, the ball-mounted lever positively interlocks the plunger, preventing its being lifted out of the plunger casing. In the alternate mode of connection, an interlock is provided as in the first mode; however, unknown to the vandal or unadvised person, the interlock is released by a simple angular movement of the plunger resulting from the flexibility and resilience of the plunger connector itself.
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