ON BALL DEFENSE护球能力;对持球的防守;对持球队员的防守;球防守

Man on Man defense人盯人

skill on city defense守城技术

law on national defense国防法

Suggestions on Coast Defense海防意见书

On Occasional Defense论偶然防卫

On Procedural Defense程序性辩护研究

ideology on maritime defense海防思想

on national defense国防论

debate on sea defense海防讨论