A filter for cervical cancer cytologic examination
A general connector for oxygen inhalation tubes
A fast-plug bacteria-proof humidification device
An visible and quantitatively liquid filling device
A fast-plug three way switch for oxygen inhalation
A modified bacteria-proof oxygen inhalation device
A thread-off proof and easily detachable connector for medical use
A rotating fast-plug three way switch
A male conical fitting with injection site
