Electronic Tubes, Magnetrons, Resistors manufacturer / supplier in China, offering Power Triode Tube 3cw20000A7 Electron Tube Used as Hf Amplifer or Audio Class B Amplifier or Linear Amplifier, Water Cooled Triode RS3040cj for RF Heating Application (RS3021CJ, RS3040CL), Air Cooled Power Triode RS3005cl Ceramic Metal Tube for Hf Heating Machine (RS3040CL) and so on.