| 摘要 |
A dispenser for dispensing a determined quantity of a liquid treating agent in a flush tank includes at least one metering cavity whose volume is close to the volume of the dose of a dispensable product, first part for communicating the cavity with a product storage tank, second part for controllingly connecting the cavity with outside, closing elements of the second part, which are controlled by a member floatingly mounted on a surface of water contained the flush tank and make it possible to close them during the waiting phase of the flushing device and to open the part when the flushing device is actuated.
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