2d 21 2D21. THYRATRON. OPERATIONAL RANGE. OF CRITICAL GRID VOLTAGE. TYPE 2D21 SHIELD-GRID VOLTS=0. RANGES SHOWN ARE FOR TWO VALUES. OF GRID RESISTOR – MEG. AND 10.. 2Dမှအထိ တစ်ပတ်စာရွှေဝင်ငွေဝင်ကဒ် Freeယူပါ#2d#2dLive. 29K views · 4 weeks agomore. Ko wai 2D3D. 190K. Subscribe. .
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