| 摘要 |
Apparatus for selectively dispensing either of two different volumes of water from a water closet comprises a mechanism for latching a valving member (e.g. a flapper valve) in a position just short of a threshold position at which it would normally "flip" to its full flush position, and for unlatching such member, after a predetermined quantity of water has flowed from the tank, to allow it to return to its closed (sealing) position.
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