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  2. Lincoln–Douglas debate format - Wikipedia

    en.wikipedia.org/wiki/LincolnDouglas_debate...

    LincolnDouglas debate (commonly abbreviated as LD Debate, or simply LD) is a type of one-on-one competitive debate practiced mainly in the United States at the high school level. It is sometimes also called values debate because the format traditionally places a heavy emphasis on logic , ethical values , and philosophy . [ 1 ]

  3. Lincoln–Douglas debates - Wikipedia

    en.wikipedia.org/wiki/LincolnDouglas_debates

    Crisis of the House Divided: An Interpretation of the Issues in the LincolnDouglas Debates, 50th Anniversary Edition. University of Chicago Press. ISBN 978-0-226-39118-2. Good, Timothy S. (2007). The LincolnDouglas Debates and the Making of a President. McFarland Press. ISBN 978-0-7864-3065-9.

  4. The Lincoln–Douglas Debates (1994 reenactments) - Wikipedia

    en.wikipedia.org/wiki/The_LincolnDouglas...

    The 1994 reenactments of the LincolnDouglas Debates took place between August 20 and October 15, 1994, and were facilitated and aired by C-SPAN.They featured historical reenactors presenting, in their entireties, the series of seven debates between Abraham Lincoln and Stephen A. Douglas that took place during the 1858 U.S. Senate campaign in Illinois.

  5. PCB NC formats - Wikipedia

    en.wikipedia.org/wiki/PCB_NC_formats

    The IPC-NC-349 format is the only IPC standard governing drill and routing formats. [5] XNC is a strict subset of IPC-NC-349, Excellon a big superset. Many indefinite NC files pick some elements of the IPC standard.

  6. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    Fractional drill bit set by Craftsman. Fractional-inch drill bit sizes are still in common use in the United States and in any factory (around the globe) that makes inch-sized products for the U.S. market. ANSI B94.11M-1979 sets size standards for jobber-length straight-shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments.

  7. Bar stock - Wikipedia

    en.wikipedia.org/wiki/Bar_stock

    Bar stock, also (colloquially) known as blank, slug or billet, [1] is a common form of raw purified metal, used by industry to manufacture metal parts and products. Bar stock is available in a variety of extrusion shapes and lengths. The most common shapes are round (circular cross-section), rectangular, square and hexagonal.

  8. Drill bit shank - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_shank

    Such a drill bit is called a reduced-shank or blacksmith's drill. For example, this allows a 1 ⁄ 2 -inch (13 mm) bit to be used in a pistol-grip drill's 3 ⁄ 8 -inch (9.5 mm) chuck. One particular type of reduced-shank drill bits are Silver & Deming ( S&D ) bits, whose sets run from 9 ⁄ 16 -inch (14 mm) to 1 + 1 ⁄ 2 -inch (38 mm) drill ...

  9. Erector Set - Wikipedia

    en.wikipedia.org/wiki/Erector_Set

    Basic Erector parts included various metal beams with regularly spaced holes for assembly using nuts and bolts. A frequently promoted patented feature was the ability to fabricate a strong but lightweight hollow structural girder from four long flat pieces of stamped sheet steel, held together by bolts and nuts (US Patent 1,066,809).

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