| 摘要 |
<p>The syringe can be disposed after use and is assembled of a cylindrical housing, a short cylindrical needle holding element to be positioned at the lower end of the housing (1), the needle (3) with a hollow rear element to be attached to an extension at the needle holder (2) and the axially movable piston (4). The piston (4) has a cylindrical front (41) acting in combination with the needle holder (2) and a predetermined breaking point (44) at its center. After an injection has been made the needle (3) can be completely retracted into the housing (1) and the piston (4) broke off, turned upside down and moved back into its prior position.</p> |
