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Iodine tungsten lamp cycle principle
In order to increase the luminous efficiency of an incandescent lamp, it is necessary to increase the temperature of the filament; and the higher the temperature of the filament, the faster the...
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Nylon and polyester screen printing
As early as the 1940s, due to the shortage of silk screens during the war, some users began to use nylon and polyester instead of silk. However, their development was carried out after World War II....