| 摘要 |
Device characterized in that it comprises a profile with a section substantially in the form of a right angle which can be coupled on the upper and lower edges of the front opening of the inspection hole, determining grooves parallel to the wall which are intended for the coupling of individual upper and lower profiles, which have a structure of two walls opposite each other, the corresponding openings in the upper and lower profiles facing each other in order to allow the slide coupling and press-fit retention of a planar closure plate. <IMAGE>
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