Penetrating objects may have damaged the interior of the tire, even if the external damage looks to be repairable.

刺穿轮胎的物体可能已损伤了轮胎的内部，即使外部的伤看上去能够修补。

youdao

Especially, the battle damage repair (BDR) for aircraft panel, which acts as one of the main components of aircraft and so is prone to external damage, is very important.

飞机壁板是飞机的主要结构部件之一，易于遭受外部损伤，其战伤修理技术研究也就尤为重要了。

youdao

While many reports focused on amputation injuries, severe internal damage can occur with little or no external indication due to blast injury.

FORBES: Crumpled Elder Runner at Boston Marathon is Well

The combination of the mental activity and the external stimulus is believed to aid in reprocessing traumatic memories in ways that reduce their pain and damage to a person's life.

CNN: What is EMDR therapy and does it help OCD?