单词	apron rolls
释义	apron rolls 运输带的托辊
随便看	electron fractography electron frame electron frequency drift electron furnace iron electron gain Electron gain electron gain-loss and energy alteration electron gap admittance electron gas electron gas channel electron gas modl Electron gastroscope electron gear electron gear shifting electron generator electron gun electron geometrical optics Electron government electron government affairs electron gun electron gun alignment electron-gun alignment electron gun alignment adjustment electron gun assembly Electron gun CAD of Gyrotron electron-gun cathode