| 摘要 |
<p>A sleeve (1.1) is positioned between the connector piece (2.2) for the fluid inlet and a transparent pipe (2.3) suitable for watching the removed substance. A ventilating valve (1) is screwed (1.3) to the sleeve (1.1) in a right angle and fitted with an operating button (3.1) at its upper end protruding from the outer surface of the housing. A soon as a blocking is visible through the pipe (2.3) the button (3. 1) is pressed facilitating air to enter the system.</p> |
