| 摘要 |
An improved syringe with a sleeve operable as a barrier effective to resist entry of undesired particles, such as microorganisms or pathogens, for contact with the inside of the syringe from the plunger end. A portion of the sleeve is configured for disposition surrounding the plunger and inside the syringe's barrel. A syringe structured according to certain principles of the invention is effective to maintain the inside of the syringe's barrel in a sterile condition, even subsequent to multiple strokes of the plunger.
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