| 摘要 |
<p>The collector has two pockets (a,b), one inside the other. The level of liquid (l) recovered by the opening (C) in the internal pocket (B) created by increase of the level of a pressure on the wall of the pocket which obstructs the aspiration orifice (D) connected to the aspiration centre. The pocket can have an upper cut out which frees a space (E) and in the pocket (A). The inner pocket can have a part folded over on itself. The fold can lower itself progressively as a function of the level of liquid.</p> |
