| 摘要 |
A syringe includes a hollow barrel adapted to be pre-filled with medicine. A piston is movably received in an open end of the hollow barrel and the open end is closed by a first seal. A closed end of the barrel has a stub extending out therefrom and a through hole is centrally defined in the stub. A second seal is formed on the top of the stub to close the through hole. An annular groove is defined in the closed end of the hollow barrel and surrounds the stub. A needle breaks through the second seal when the needle hub is attached to the stub. Further, the stub can be separated from and then received in the hollow barrel after the syringe has been used.
|
