| 摘要 |
An engaging plate is provided on a handle, and a lock lever is provided to be engaged with a hook of the engaging plate. A spring is provided to urge the lock lever so as to engage the lock lever with the hook to lock the handle. The handle is released by a slide plate provided to be engaged with the lock lever. A pushbutton is fixed to the slide plate for pushing the slide plate. When the slide plate is pushed, the lock lever is rotated to release the lock lever from the hook.
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