| 摘要 |
In addition to the window (11) for the microfilm image (12), a microfiche (10) has a further window (14) into which there is glued a transparent film (15) which can be inscribed and on which a signature (17) can be made. Both windows are transilluminated and projected onto a common projection surface in such a way that the projected image of the film (15) lies completely inside the projection surface of the microfilm image. It is, of course, also possible to achieve the same effect using an epidiascopic projection device. <IMAGE>
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