Many industrial, military or otherwise professional tubes were also produced. Only a few types are still used today, mainly in high-power, high-frequency applications and also in boutique guitar amplifiers.
ISO 3166-1 [1 ] es la primera parte del estándar internacional de normalización ISO 3166, publicado por la Organización Internacional de Normalización (ISO), que proporciona códigos para los nombres de países y otras dependencias…
The Plarf is the 4th branch of the People's Liberation Army (PLA) and controls China's arsenal of land-based ballistic, hypersonic, cruise missiles—both nuclear and conventional.