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DE3713461A1
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Butt joint between two double-walled round sheet metal sections
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DE3537504C1
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Butt joint between two thin-walled, round sheet-metal tube portions
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Connecting flange for sheet-metal channel sections
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FLANGE RING FOR PIPES
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Auxiliary device for placing a flange ring on a sheet-metal tube
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AIR CHANNEL SECTION WITH MOLDED CONNECTING FLANGE
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Two-part corner bracket for connecting flanges of sheet metal duct sections
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Butt connection between two sheet-metal tubular sections
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DE3314129A1
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Clamping ring for butt connections between two thin-walled round sheet-metal tubular sections, and a clamping apparatus for the same
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DEVICE FOR MOLDING FLANGES ON AIR CHANNEL WALLS
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Flange ring for pipes
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JOINT CONNECTION FOR CHANNEL SECTIONS FROM SHEET, IN PARTICULAR. DUCT SECTIONS FOR VENTILATION SYSTEMS
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DEVICE FOR HOLDING CONNECTING FLANGES TOGETHER ON AIR DUCT SECTIONS
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DK146736B
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Procedure for automatic manufacture of channel elements and apparatus for exercising the procedure
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