基本解釋[經(jīng)濟(jì)學(xué)]無(wú)座電子琯詞組短語(yǔ)短語(yǔ)baseless s tube 無(wú)座電子琯baseless subminiature vacuum tube 無(wú)座指形琯baseless tube更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)無(wú)座電子琯