[化工] 耐侵蚀的
... unassorted 未分级的;未分选的 unattackable 耐侵蚀的 unattenuated 未变稀的;未变细的 ...
不可攻破
... 攻破垄断 break the monopoly 不可攻破 unbreakable ; Unattackable 攻破击败 breach and defeat ...
不可侵害电极
unattackable:
From un- + attack + -able