| 摘要 |
The invention relates to a closure device for two openings provided in compound units which can move in relation to each other, the opening provided in the outer compound unit being set in front of the opening provided in the inner compound unit. The relative movement of the compound units is not to be hindered by the closure elements for the two openings and the multi-leaf formation of the structure is also to be preserved in the region of the openings. In this arrangement, a spring is arranged between the cover closing the inner opening and the closure of the outer opening, the mounting of the cover and that of the closure of the outer opening being arranged separately from each other in the respective compound unit.
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