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  2. Ring binder - Wikipedia

    en.wikipedia.org/wiki/Ring_binder

    Three ring binder sprung clip mechanism. Japan uses a unique system, referred to as J-Binder. This system is compatible with A4 and B5 paper with different products. The A4 version uses 30 closely spaced rings, while the B5 one uses 26. Less common variants such as a 20 ring A5 version also exist. [6] Personal organizer with metallic ring binder

  3. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    Three different international-standard two-hole punches. 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).

  4. Marman clamp - Wikipedia

    en.wikipedia.org/wiki/Marman_clamp

    Marman clamps are used extensively in spaceflight systems and are common mechanical load-transfer and clamping mechanisms for connecting the upper stage and the satellite payload of space vehicles, [3] [4] for example, on the Cassini Plasma Spectrometer on the Cassini orbiter. They may also be used to join stages of a booster rocket.

  5. Fastener - Wikipedia

    en.wikipedia.org/wiki/Fastener

    Hex head fasteners: Known for their high torque capacity, hex head fasteners are easily driven with a spanner or wrench, ideal for heavy-duty applications. Square head fasteners: Offering increased wrenching area and reduced risk of rounding off, square head fasteners are used in high torque applications.

  6. Trapper Keeper - Wikipedia

    en.wikipedia.org/wiki/Trapper_Keeper

    A pink Five Star Trapper Keeper. Trapper Keeper is a brand of loose-leaf binder created by Mead.Popular with students in the United States and parts of Latin America from the 1970s to the 1990s, it featured sliding plastic rings (instead of standard snap-closed metal binder rings), folders, and pockets to keep schoolwork and papers, and a wrap-around flap with a Velcro closure (originally a ...

  7. Cemented carbide - Wikipedia

    en.wikipedia.org/wiki/Cemented_carbide

    The coefficient of thermal expansion of cemented tungsten carbide is found to vary with the amount of cobalt used as a metal binder. For 5.9% cobalt samples, a coefficient of 4.4 μm/m·K was measured, whereas 13% cobalt samples have a coefficient of around 5.0 μm/m·K.