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roller shutter
A roller shutter, roller door or sectional overhead door is a type of door or window shutter consisting of many horizontal slats (or sometimes bars or web systems) hinged together. The door is raised to open it and lowered to close it. On large doors, the action may be motorized. It provides protection against wind and rain. In shutter form, it is used in front of a window and protects the window from vandalism and burglary attempts.
==Applications==
Roller shutters have many applications, including doors for vans, garages, kitchens, schools, prisons and warehouses. In some parts of the world, roller shutters are subsidized by local governments 〔Roller Shutters subsidy (Cockburn City Council Roller Shutters Subsidy )〕 due to the inherent security benefits. In areas that are frequently exposed to inclement weather, roller shutters are used as a method of insulation and can protect windows against hail damage.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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