| 摘要 |
A locking device for a valve having a rotatable shaft including a stop plate, and a stop secured to a housing, including a hollow body having a first chamber for receiving the shaft, a threaded aperture extending into the first chamber for receiving a screw, a second chamber surrounding the screw, a lockable closure preventing access to the screw, and a tab coupled to the hollow body adapted to be received between the stop plate and the stop.
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