卵形端面阴极 oval cathode

阴极引出端 [电子] cathode end

阴极端子 cathode terminal

阴螺纹端面 box face

椭圆形端面阴极 egg-shaped cathode

带阴螺纹的杆端轴承 Rod end with female thread

阴道断端 vaginal cuff

阴极结构下端 Cathode structure underside