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Diathermy is produced by two techniques: short-wave radio frequencies in the range 1–100 MHz (shortwave diathermy) or microwaves typically in the 915 MHz or 2.45 GHz bands (microwave diathermy), the methods differing mainly in their penetration capability. [4] [5] [6] It exerts physical effects and elicits a spectrum of physiological responses.
Recognising the machine's potential, IBM arranged for Liebert to debut his invention at the World Computer Conference in Philadelphia. [ 1 ] [ 2 ] In 1965, Liebert founded Liebert Corporation as the first manufacturer air conditioning units with temperature and humidity controls specific for computer room applications.
Most recently, certain assets and centrifugal chiller technology from BiXin Energy, a manufacturer of chillers, heat pumps, heat-recovery solutions, and air-handling units, were acquired in December 2024. [19] In 2023, Vertiv's share price increased 252%, outperforming all companies in the S&P 500 index. [20]
[2] [3] Today, machines with the name Hyfrecator are sold only by ConMed Corporation. However, the word "hyfrecator" is sometimes used as a genericized trademark to refer to any dedicated non-ground-return electrosurgical apparatus, and a number of manufacturers now produce such machines, although not by this name.
These were limited to frequencies of 0.1 – 2 MHz, called "longwave" diathermy. The current was applied directly to the body with contact electrodes, which could cause skin burns. In the 1920s the development of vacuum tube machines allowed frequencies to be increased to 10 – 300 MHz, called "shortwave" diathermy. The energy was applied to ...
One example of such a machine is called a hyfrecator. This term began in 1940 as a Birtcher Corporation brand name Hyfrecator for "High Frequency Eradicator", but now serves generically to describe a general class of single-electrode, non-isolated (earth-referenced) low-powered electrosurgical machines intended mainly for office use. An ...
Slot machine manufacturers (24 P) T. Textile machinery manufacturers (1 C, 34 P) V. Vending machine manufacturers (1 C, 14 P) Pages in category "Machine manufacturers"
This page was last edited on 11 February 2018, at 19:37 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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