The invention relates to a device (1) constructed as portable hook-on frame (2, 3, 4,) with folding work tops or panels (5, 6, 7) and is composed of a basic frame (2) with a telescopic suspension frame (3) with suspension hooks (4), in which out of the basic frame (2) nearly the bottom side a hinging foldable work top (5) and nearby the upper side a hinging expandable U-shaped document holder frame (6) with plate (7) is mounted, in which the whole is especially useable for technicians, whom execute work on measurement and control cabinets and such.


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< Terrestrial seismic acquisition process and apparatus, in particular for a vertical seismic acquisition

> Speaker apparatus

> Speaker system and a method for improving sound quality thereof

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