| 摘要 |
The present invention has: a tip opening; a tubular passage to which a first selection means is provided that allows the passage of a non-subject contained in a subject aggregate suctioned from the tip opening; and a capturing means that is provided to the downstream side of the first selection means in the tubular passage in the direction of suctioning of the subject aggregate and that captures the non-subject. The capturing means has: a passage hole that allows the passage of the non-subject; and a retention section that retains the non-subject that has passed through. The present invention allows the passage through the passage hole of only contaminants having a smaller diameter than the desired diameter during suctioning, and can cause the retention thereof at the retention section. As a result, by means of performing only a series of simple operations comprising suctioning and discharging, it is possible to discharge only a selection subject. In this operation, as such tasks as removing a capturing means such as a filter or the like are unnecessary, contamination is not caused before or after operation. |
