Built to withstand the attack of small armies such as swords and spears, these walls were made mostly by stamping earth and gravel between board frames.
为了抵御小型兵器的袭击，例如剑、矛，城墙大多由版筑(在夹板中填入泥土和碎石)而成。
2
This is the engine cover design, boardstamping dies used in pulling one engineering service modules.