| 摘要 |
The present invention is directed to a sealing piston for syringe. The sealing piston includes a first sealing element, a second sealing element, and a third sealing element. The second sealing element is elastic and expandable. One end surface of the second sealing element is connected with the first sealing element, and another end surface of the second sealing element is connected with the third sealing element for constraining the second sealing element. The present invention not only effectively resolves the air-leakage problem of a conventional syringe, but also enhances dispensing accuracy.
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