| 摘要 |
<p>In dental surgery apparatus provided with the usual compressed air and water circuits supplying power and spray to drills and other instruments (1), use is made of a reservoir (2) from which to dispense physiological saline into a pipeline (3) connecting with the main water supply circuit; upstream of the resulting connection, the respective lines carrying saline and spray water are controlled by a 3-way, 2-position valve that permits of alternating from one source of liquid to the other as required.</p> |
