Electronic Tubes, Magnetrons, Resistors manufacturer / supplier in China, offering Air-Cooled Power Triode 3cx20000A7 Metal Ceramic Oscillator Tube with High Quality Equivalent to Eimac Triode 3cx20000A7 (3CX15000A7, 3CX3000A7, 3CX10000A7), Air-Cooled Electron Tube 3cx20000A7 Metal Ceramic Oscillator Tube with High Quality Equivalent to Eimac Triode 3cx20000A7 (3CX15000A7, 3CX3000A7, 3CX10000A7), Electron Tube Yu-108 Ceramic Vacuum Valve for High Frequency Generator and so on.