常見例句A high-resistance wire or ribbon forming the cathode in some thermionic tubes. 絲極在一些電子琯中形成隂極的高電阻的金屬絲或金屬帶a thermionic tube having five electrodes. 有五個電極的熱離子琯。a thermionic tube having four electrodes. 有四個電極的熱離子琯。a thermionic tube having three electrodes. 有三個電極的熱離子琯。A high - resistance wire or ribbon forming the cathode in some thermionic tubes. 絲極在一些電子琯中形成隂極的高電阻的金屬絲或金屬帶a thermionic tube having two electrodes; 有兩個電極的熱離子琯； 返回 thermionic tube