| 摘要 |
The disposal syringe loses its function for injection after a use that is easily distinguished visually. The syringe tip is arranged to easily fit in the needle hub but not to be separable. To prevent a reuse, an arrow pin plugging the path for air and injection liquid at the front end of a gasket is automatically removed upon use to allow air flow in the pain and make the suction of the liquid impossible or make the remaining liquid flow backward forcedly in the path in trying to reuse the syringe.
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