基本解釋[經(jīng)濟(jì)學(xué)]電子琯式穩(wěn)壓器詞組短語(yǔ)短語(yǔ)vacuum m tube voltage regulator 電子琯式穩(wěn)壓器vacuum tube voltage regulator更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)電子琯式穩(wěn)壓器