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Mirro is an American cookware brand owned by the French consortium Groupe SEB, a world's largest cookware manufacturer, through its Colombian subsidiary IMUSA. Between 1909 and 2003, it was an American company specialising in aluminium cookware called Mirro Aluminum Company , based in Manitowoc, Wisconsin .
Originally called "Northwestern Steel and Iron Works" the company changed its name to the "National Pressure Cooker Company" in 1929 and then National Presto Industries, Inc. 1953. [3] The company originally produced pressure canners for commercial, and later home, use. Beginning in 1939, the company introduced small home-use cooking appliances.
Pressure canning is the only safe home canning method for meats and low-acid foods. This method uses a pressure canner — similar to, but heavier than, a pressure cooker. A small amount of water is placed in the pressure canner and it is turned to steam, which without pressure would be 212 °F (100 °C), but under pressure is raised to 240 °F ...
The first complex grating was made by J. Canning in 1994. [15] [citation needed] This supported the development of the first distributed feedback (DFB) fiber lasers, and also laid the groundwork for most complex gratings that followed, including the sampled gratings first made by Peter Hill and colleagues in Australia. [citation needed]
Over the July 4th weekend, Fowler and Post came up with the idea of the tandem mirror, a system consisting of two mirrors at either end of a large chamber that held large amounts fusion fuel at lower magnetic pressure. They returned to LLNL on Monday to find the idea had been developed independently by a staff physicist, Grant Logan.