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A gear rack and use of such a device
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Spur rod for greenhouse multiple roof window - has toothed ridge along double T=bar section protruding beyond paired ribs (DK 3.8.81)
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Rack and the use thereof in an opening and closing device for roof hatches and skylights
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Rack arrangement and its use in an opening and closing device for roof flaps and skylights
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Opening and closing mechanism for roof windows and hanges and tools for use of the mechanism
