ITK12-1 Ultra-High Frequency Metal Ceramic Heating Vacuum amplifier tube
FD-912S-350KW Electron Tube Power Tubes
TH504C-350KW Electron Tube Power Tubes
3CW40000H3 Power Metal Ceramic Ultra-high Frequency Heating Electron Valve
3CW45000H3 High Frequency Heating tube Metal Ceramic Oscillator tube
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