| 摘要 |
<p>A dental drill has a hydraulic-pneumatic control device with an extended narrow supply block with channels running parallel to its lont axis and closed at both ends. A series of holes or groups of holes with apertures are mounted on the upper surface of the block. An attachment unit connects the flow media to the block for each interchangeable dental instrument through one group of apertures and a control is fitted via another group of holes with pneumatically operated valves.</p> |
