| 摘要 |
A cradle switch plug is placed into the cradle of a dental instrument in a dental delivery unit to deactivate the instrument thereby allowing the instrument to remain at the ready without endangering or spraying the user and/or assistants and/or patients. In addition, when an instrument is removed from an air fitting a blind air fitting plug is screwed into the air fitting. The air plug prevents entry of debris into the air fitting and/or air ports thereof. The air plug also enables proper seating of the air fitting within the cradle and, thus, actuation of the cradle switch.
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