| 摘要 |
<p>The instrument (1) has a suction/rinsing pipe (3) fastened to a handle (2). A valve unit (10) is arranged in the handle and includes valves i.e. fine dosable valves, arranged in respective suction and rinsing channels. Each valve includes a valve plunger for closing the associated channels. The plunger is driven by a valve drive, which is actuatable only with a finger. One of the valves of the suction channel remains in a last valve position in a non-actuation position. The other valve of the rinsing channel automatically closes the rinsing channel in the non-actuation position.</p> |
