| 摘要 |
<p>Filters which can be mounted to a cabinet without confirmation of the direction of the filters. Filters (10, 11) are each provided with projection-recess sections (43) formed in the direction of movement of the filter and engaging with drive devices (41) for moving the filters (10, 11). The projection-recess sections (43) are each composed of recesses (43b) and projections (43a). The recesses (43b) are formed on one surface side of each of the filters (10, 11), and the projections (43a) are formed on the other surface side facing the recesses (43b). Said surface side and the other surface side of each of the filters have the projections and recesses of the same shape.</p> |
