[War Thunder] The purpose of the golden ball attached to Type 89/ENG SUB

English subtitle: Weapon’s warehouse German subtitle: Magister Generalis 🇨🇭🇻🇦 Subtitles in Vietnamese ᴉl̴ouuɐ̸Ɔ̵ǝ̵ᴉ̸uu̵ᴉΛ Japanese subtitles: noga_ Music: