Electronic Tubes, Magnetrons, Resistors manufacturer / supplier in China, offering Triode Power Vacuum Tube Yd1212 for Optimal Performance, RF Amplifier Tube 3cw20000h7 Power Triode Electron Tube (3CW20000A7, 3CW20000H3), Electron Tube Yu-108 Ceramic Vacuum Valve for High Frequency Generator and so on.