1、especially one in which a hole is made in the skin using a weapon

= especially one,  a hole is made in which in the skin using a weapon

2、especially a cut or a hole in your flesh, which is caused by a gun, knife, or other weapon.【which指什么，（ a cut or a hole in your flesh）还是（a cut or a hole）】

= especially a cut or a hole in your flesh, which is caused by a gun, knife, or other weapon.  or 表示其中一个，从后文这里不太可能把a cut与a hole看成同一种东西。