| 摘要 |
The invention is directed to an antitheft device for blocking the passage of fluid in a supply line. Inlet and outlet chambers are coupled in line with the supply. A distribution chamber in flow communication with the inlet and outlet chambers through a passage has a piston movable from an open to a closed position for likewise opening and closing the device. An internal latch operated by means of a key actuates the piston for opening and closing the supply line.
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