| 摘要 |
<p>An automatically retractable safety syringe comprises a needle, a needle holder, a rubber ring of the needle holder, a needle cap, a breakable plunger and a syringe barrel. The breakable plunger is positioned in the syringe barrel, and when compressed toward the bottom, it breaks in half, giving sufficient space for the spring to expand and cause automatic retraction of the needle.</p> |
