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  2. Shark's 'powerhouse' cordless Vertex vacuum is a jaw-dropping ...

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    Enter the Shark Vertex Cordless Stick Vacuum. Just for today, this highly rated powerhouse is 40% off — an impressive $200 discount — at Amazon! ... It also has a self-cleaning roller, so you ...

  3. This bestselling 'lightweight but sturdy' Shark vacuum is ...

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    This popular Shark vacuum is powerful and great for hard-to-reach spots — and always selling out. However, not only is the bestseller in stock right now, but you can also snatch it up at Walmart ...

  4. Magnus effect - Wikipedia

    en.wikipedia.org/wiki/Magnus_effect

    The Magnus effect is a phenomenon that occurs when a spinning object is moving through a fluid or gas (air). A lift force acts on the spinning object and its path may be deflected in a manner not present when it is not spinning. The strength and direction of the Magnus effect is dependent on the speed and direction of the rotation of the object.

  5. Shear forming - Wikipedia

    en.wikipedia.org/wiki/Shear_forming

    In shear spinning the area of the final piece is approximately equal to that of the flat sheet metal blank. The wall thickness is maintained by controlling the gap between the roller and the mandrel. In shear forming a reduction of the wall thickness occurs. Before the 1950s, spinning was performed on a simple turning lathe. When new ...

  6. Robotic vacuum cleaner - Wikipedia

    en.wikipedia.org/wiki/Robotic_vacuum_cleaner

    Robotic vacuum cleaner on a hardwood floor. A robotic vacuum cleaner, sometimes called a robovac or a roomba as a generic trademark, is an autonomous robotic vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors and robotic drives with programmable controllers and cleaning routines.

  7. Spherical roller bearing - Wikipedia

    en.wikipedia.org/wiki/Spherical_roller_bearing

    Spherical roller bearing with a brass cage in a cut-through view A spherical roller bearing is a rolling-element bearing that permits rotation with low friction, and permits angular misalignment. Typically these bearings support a rotating shaft in the bore of the inner ring that may be misaligned in respect to the outer ring.

  8. Rotation - Wikipedia

    en.wikipedia.org/wiki/Rotation

    A sphere rotating (spinning) about an axis. Rotation or rotational motion is the circular movement of an object around a central line, known as an axis of rotation.A plane figure can rotate in either a clockwise or counterclockwise sense around a perpendicular axis intersecting anywhere inside or outside the figure at a center of rotation.

  9. Spinner shark - Wikipedia

    en.wikipedia.org/wiki/Spinner_shark

    The spinner shark (Carcharhinus brevipinna) is a type of requiem shark, in the family Carcharhinidae, named for the spinning leaps it makes as a part of its feeding strategy. This species occurs in tropical and warm temperate waters worldwide, except for in the eastern Pacific Ocean .

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