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Stools including adjustable seat-height capabilities. These stools are usually metallic with an upholstery seat, and some include backrest, armrests, and/or casters; the height adjustment may be either mechanical (e.g., revolving seat), pneumatic, or sometimes hydraulic. Adjustable stools are designed to provide seating to the healthcare staff during clinical or dental procedures (e.g., examination, treatment, surgery).
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