| 摘要 |
Disclosed is a flush valve for toilet tanks comprising in a general form a hollow tubular member having a valve head on its lower end and adapted at its upper end to seat with a second valve head. The lower end rests in a valve seat located in or near the bottom of the flush tank. A second valve head is positioned on or seats in the upper end of the tubular member. It is positioned so that it can be raised a short distance to permit the flow of water into the top of the tubular member and from thence into the stool below.
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