A platform or mound of earth within a fort from which guns are fired over the parapet.
A platform or mound of earth within a fort from which guns are fired over the parapet.
炮墩，炮座堡垒内部的平台或土墩，大炮可从中越过胸墙而发射
A platform or mound of earth within a fort from which guns are fired over the parapet.
炮墩，炮座堡垒内部的平台或土墩，大炮可从中越过胸墙而发射