Development status of China's tungsten industry

Tungsten is known as “industrial MSG” and is a very important rare mineral resource. Tungsten and tungsten products have high melting point, high density and high hardness, and are widely used. Since the 19th century, tungsten is used for the first time since the production of alloy ste

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The calorimeter ideal insulation in three situations

Calorimeters In ideal insulation, there is no heat exchange between the measurement system and the environment. The following three conditions meet this requirement as much as possible: 1) The sample is reflected so fast that the amount of heat that escapes from the system at the measure

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