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2. Waveguide flange - Wikipedia

   en.wikipedia.org/wiki/Waveguide_flange

   For standard rectangular waveguide the second letter is A to E, where A and C are round flanges, B is square and D and E are rectangular. So for example UBR220 is a square plain cover flange for R220 waveguide (that is, for WG20, WR42), PDR84 is a rectangular gasket flange for R84 waveguide (WG15, WR112) and CAR70 is a round choke flange for ...

3. Dowel - Wikipedia

   en.wikipedia.org/wiki/Dowel

   A dowel plate. The traditional tool for making dowels is a dowel plate, an iron (or better, hardened tool steel) plate with a hole having the size of the desired dowel.To make a dowel, a piece of wood is split or whittled to a size slightly bigger than desired and then driven through the hole in the dowel plate.

4. Nut (hardware) - Wikipedia

   en.wikipedia.org/wiki/Nut_(hardware)

   Joseph Whitworth in 1841 proposed that a standard should be set, but it did not happen immediately. In 1851 the Great Exhibition of the Works of Industry of All Nations was to be held in Hyde Park, London, England, and it was decided to build the Crystal Palace as part; this had to be done in 190 days, and at reasonable cost. Research into the ...

5. Dowel bar retrofit - Wikipedia

   en.wikipedia.org/wiki/Dowel_bar_retrofit

   A dowel bar retrofit (DBR) is a method of reinforcing cracks in highway pavement by inserting steel dowel bars in slots cut across the cracks. It is a technique which several U.S. states' departments of transportation have successfully used in repairs to address faulting in older jointed plain concrete pavements.

6. Structural steel - Wikipedia

   en.wikipedia.org/wiki/Structural_steel

   Steel sections and plate – EN 10025-1; Hollow sections – EN 10219-1 and EN 10210-1; Pre-loadable bolts – EN 14399-1; Non-preloadable bolts – EN 15048-1; Fabricated steel – EN 1090 −1; The standard that covers CE Marking of structural steelwork is EN 1090-1. The standard has come into force in late 2010.

7. Types of press tools - Wikipedia

   en.wikipedia.org/wiki/Types_of_press_tools

   Die Back Plate:This plate prevents the hardened Die inserts penetrating into bottom plate. Guide Pillar & Guide Bush : Used for alignment between top and bottom halves of the press tools. Bottom plate:It is used to hold bottom half of the press tool with press slide. Stripper plate: it is used to strip off the component from punches.

8. Square (tool) - Wikipedia

   en.wikipedia.org/wiki/Square_(tool)

   Designed for marking the centre of round materials, such as dowels in woodworking. The most common form consists of an L-shaped stock with the blade fixed on top bisecting the stock. [4] Another type is made from a single piece of metal with two perpendicular pins which are placed against the edge of the workpiece.

9. Washer (hardware) - Wikipedia

   en.wikipedia.org/wiki/Washer_(hardware)

   Assorted washers: flat, split, star and insulating. A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut.