sphere gap 球间隙 ; [电] 球隙 ; 球隙放电器

standard sphere gap 标准球形放电器

sphere gap measurement 测量球隙

sphere-gap 球极

sphere gap switch 球隙开关

vertical sphere-gap 垂直球隙

measuring sphere gap 测量球隙

horizontal sphere-gap 水平球隙

sphere spark-gap 球形火花放电器

sphere-gap for measurement 测量球隙