| 摘要 |
<p>PATENT APPLICATION of THOMAS H. McKELVEY for DENTAL SALIVA EJECTOR A dental saliva ejector in which the ejector tube is equipped with a free-swivelling connector for connection to a suction conduit, the outlet end portion of the ejector tube being removably engaged in the bore of one member of the swivel connector in a resiliently compressed force fit, the swivel connector comprising two members which can be separated for cleaning.</p> |
