单词	tetrode
释义	tetrode noun tet·​rode ˈte-ˌtrōd  : a vacuum tube with a cathode, an anode, a control grid, and an additional grid or other electrode Word History First Known Use 1886, in the meaning defined above
随便看	por favor poral porbeagle porbeagles porc porcate porcated porcelain porcelain ampelopsis porcelain blue porcelain cement porcelain clay porcelain crab porcelain enamel porcelain green porcelain jasper porcelain paper porcelain stone rubble concrete rubble drain rubble masonry rubbled rubbleman rubblemen rubbles

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