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  2. Wheatstone system - Wikipedia

    en.wikipedia.org/wiki/Wheatstone_system

    The paper punches were labelled with numbers: 1 for the top hole of the dot, 2 for the sprocket hole for dot, and 3 for the bottom hole for dot. When a dash was punched, extra hole punches to the right punched a centre hole with number 4 and a bottom hole with number 5. [2] The perforator was introduced in 1867. [6]

  3. History of Roman and Byzantine domes - Wikipedia

    en.wikipedia.org/wiki/History_of_Roman_and...

    Its name, Pantheon, comes from the Greek for "all gods" but is unofficial, and it was not included in the list of temples restored by Hadrian in the Historia Augusta. Circular temples were small and rare, and Roman temples traditionally allowed for only one divinity per room. The Pantheon more resembles structures found in imperial palaces and ...

  4. Pantheon, Rome - Wikipedia

    en.wikipedia.org/wiki/Pantheon,_Rome

    The Pantheon (UK: / ˈ p æ n θ i ə n /, US: /-ɒ n /; [1] Latin: Pantheum, [nb 1] from Ancient Greek Πάνθειον (Pantheion) '[temple] of all the gods') is a former Roman temple and, since AD 609, a Catholic church (Italian: Basilica Santa Maria ad Martyres or Basilica of St. Mary and the Martyrs) in Rome, Italy.

  5. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    A hole punch, also known as hole puncher, or paper puncher, is an office tool that is used to create holes in sheets of paper, often for the purpose of collecting the sheets in a binder or folder (such collected sheets are called loose leaves). A hole punch can also refer to similar tools for other materials, such as leather, cloth, or sheets ...

  6. Rotunda (architecture) - Wikipedia

    en.wikipedia.org/wiki/Rotunda_(architecture)

    Cross-section of the Pantheon's rotunda. A rotunda (from Latin rotundus) is any roofed building with a circular ground plan, and sometimes covered by a dome.It may also refer to a round room within a building (a famous example being the one below the dome of the United States Capitol in Washington, D.C.).

  7. List of largest domes - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_domes

    The Pantheon in Rome, built in the 2nd century, was the largest dome in the world for over a millennium, and is still the largest unreinforced solid concrete dome. The dome of Florence Cathedral was the largest in the world from its construction in 1436 to 1871, and is the largest brick and mortar dome.

  8. Punch press - Wikipedia

    en.wikipedia.org/wiki/Punch_press

    A punch press is a type of machine press used to cut holes in material. It can be small and manually operated and hold one simple die set, or be very large, CNC operated, with a multi-station turret and hold a much larger and complex die set.

  9. Knockout punch - Wikipedia

    en.wikipedia.org/wiki/Knockout_punch

    Chassis punches: assorted sizes round and square Chassis punches: assorted sizes round and square disassembled. In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw.

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