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A copper intrauterine device (IUD), also known as an intrauterine coil or copper coil or non-hormonal IUD, is a type of intrauterine device which contains copper. [3] It is used for birth control and emergency contraception within five days of unprotected sex . [ 3 ]
It is mainly available in China and Europe. A framed copper IUD called the IUB SCu300 coils when deployed and forms a three-dimensional spherical shape. It is based on a nickel titanium shape memory alloy core. [41] In addition to copper, noble metal, and progestogen IUDs, women in China can get copper IUDs with indomethacin. This non-hormonal ...
A coil with a core which is a straight bar or other non-loop shape is called an open-core coil. This has lower magnetic field and inductance than a closed core, but is often used to prevent magnetic saturation of the core. A coil without a ferromagnetic core is called an air-core coil. [14]
Risks: A copper futures ETF may be a better pick to capture the short-term moves in the metal’s price rather than a long-term buy-and-hold. The fund charges a substantial expense ratio, and the ...
Copper, steel, brass, iron, and nickel are commonly used metals in bimetallic strips. [6] Metal alloys have been used in bimetallic strips as well, such as invar and constantan . Material selection has a significant impact on the working temperature range of a bimetallic strip, with some having a temperature limit up to 500°C, with others only ...
Grooved coils facilitate more efficient heat transfer than smooth coils. [1] [2] Small diameter coils have better rates of heat transfer than conventionally-sized condenser and evaporator coils with round copper tubes and aluminum or copper fin that have been the standard in the HVAC industry for many years. Small diameter coils can withstand ...
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