上海快三形态走势图一定牛 www.gdeqp.com Taking advantage of the high thermostability of the tungsten copper military defense material, in the 1960s,the USA use it to be the guide rail of the railgun, nozzle throat lining of the rocket-powered missile and jet vane which are used under the high temperature. The theory of tungsten copper military defense materials applied as high temperature material in military usage is that when the air temperature is close to event exceed the temperature melting point of tungsten (over3,000 ℃), the content of copper in tungsten copper military defense materials evaporate and then absorb a great deal of heat , which greatly reduce temperature of tungsten copper military made parts. Along with the exploitation of the tungsten copper military defense material in the national defense military, the application of the high temperature tungsten copper alloy is substantially increasing.
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