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A standard upright negative 80 degree freezer. An ultra low temperature (ULT) freezer is a refrigerator that stores contents at −80 to −86 °C (−112 to −123 °F). [1] An ultra low temperature freezer is commonly referred to as a "minus 80 freezer" or a "negative 80 freezer", referring to the most common temperature standard. [2]
The ECL circuitry utilized DC voltages of +0 and -2 volts, with the CAU requiring four 50 amp -2 volt power supplies. Power was 400 Hz, to reduce large scale DC power supplies. The 400 Hz power was supplied by a motor/alternator, because even though solid state 400 Hz inverters were available, they were not considered reliable enough to meet ...
Dirt Devil is a brand name originally introduced (or debuted) in 1981 by the Royal Appliance Manufacturing Co, an American vacuum cleaner and floor care company. The company and the brand are now owned by TTI Floor Care North America, a subsidiary of Hong Kong–based Techtronic Industries, who also own Oreck, Vax, and Hoover North America.
The Moosoo cordless vacuum on Amazon is the best lightweight and affordable stick vacuum cleaner, according to shoppers who say it’s the“best bang for your buck.”
The first upright vacuum cleaner was invented in June 1908 in North Canton, Ohio by department store janitor and occasional inventor James Murray Spangler.Spangler was an asthmatic, and suspecting the carpet sweeper he was using at work was the cause of his ailment, he created a basic suction-sweeper by mounting an electric fan motor on a carpet sweeper and then adding a soap box and a broom ...
The company claims to have innovated the refrigerator light, the upright freezer, and the "Air Sweep" mechanism for distributing conditioned air. In 1956, Hupp Corporation acquired Gibson. [ 2 ] In 1967 Hupp merged with White Consolidated Industries (WCI), which created the White-Westinghouse brand in 1975. [ 3 ]
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