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An office chair, or desk chair, is a type of chair that is designed for use at a desk in an office. It is usually a swivel chair , with a set of wheels for mobility and adjustable height. Modern office chairs typically use a single, distinctive load bearing leg (often called a gas lift ), which is positioned underneath the chair seat.
A gas lift chair is a form of office chair that allows the user to modify their height in relation to the height of a desk, leading to an increase in comfort and ergonomic benefit. A patent describing a common configuration of a gas lift cylinder by John Wang, published 20 May 1989.
Office swivel chairs, like computer chairs, usually incorporate a gas lift to adjust the height of the seat, but not usually large (e.g. recliner) swiveling armchairs. A draughtsman 's chair is a swivel chair without wheels that is usually taller than an 'office chair' for use in front of a drawing board .
A wheel cylinder is a component of a hydraulic drum brake system. [1] It is located in each wheel and is usually positioned at the top of the wheel, above the shoes. Its function is to exert force onto the shoes so as to bring them into contact with the drum and stop the vehicle with friction. [2] The wheel cylinders are usually connected to ...
Cylinder wheels provide a large, wide surface with no center mounting support (hollow). They can be very large, up to 12" in width. They are used only in vertical or horizontal spindle grinders. Cylinder or wheel ring is used for producing flat surfaces, the grinding being done with the end face of the wheel.
Omni wheels or poly wheels, similar to Mecanum wheels, are wheels with small discs (called rollers) around the circumference which are perpendicular to the turning direction. The effect is that the wheel can be driven with full force, but will also slide laterally with great ease. These wheels are often employed in holonomic drive systems.
Depot maintenance for the B-2 is accomplished by USAF contractor support and managed at Oklahoma City Air Logistics Center at Tinker Air Force Base. [7] Originally designed to deliver nuclear weapons, modern usage has shifted towards a flexible role with conventional and nuclear capability. [91] The B-2's combat debut was in 1999, during the ...
A prayer wheel, or mani wheel, is a cylindrical wheel (Tibetan: འཁོར་ལོ།, Wylie: ' khor lo, Oirat: кюрдэ) for Buddhist recitation. The wheel is installed on a spindle made from metal, wood, stone, leather, or coarse cotton. Prayer wheels are common in Tibet and areas where Tibetan culture is predominant.
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