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Modern manual door closer Eclipse door spring and separate checking mechanism. A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior.
Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .
One advantage over the Phillips drive is that one driver or bit fits all screw sizes. It is often found in marine hardware and requires a Frearson screwdriver or bit to work properly. The tool recess is a perfect, sharp cross, allowing for higher applied torque, unlike the rounded, tapered Phillips head, which can cam out at high torque. It was ...
In the mathematical theory of knots, the Perko pair, named after Kenneth Perko, is a pair of entries in classical knot tables that actually represent the same knot. In Dale Rolfsen 's knot table, this supposed pair of distinct knots is labeled 10 161 and 10 162 .
Sumire Hoshino (星野スミレ, Hoshino Sumire) / Perman 3 (パーマン 3号, Pāman San-gō) / Perko (パー子, Pāko) / Pergirl Although a girl, she is officially addressed as "Perman 3", but is nicknamed "Perko". Her secret identity, which she doesn't reveal even to her teammates, is Sumire Hoshino, who is a famous child actress.
IKEA founder Ingvar Kamprad (right) shakes hands with Hans Ax, IKEA's first store manager, in 1965.. In 1943, then-17-year-old Ingvar Kamprad founded IKEA as a mail-order sales business, and began to resell furniture five years later. [23]