塔形电子管 盘封管 盘封三极管的英文

megatron

• 塔形:    turriform
• 电子管:    electron tube duct ...
• 盘:    tray; plate; dish
• 封:    close; seal
• 管:    pipe; tube
• 封三:    inside back cover
• 极:    I the utmost point ...