The research gives prominence to three main way of using earth, they are mould board building, rafter building, and earthen brick building.
文中着重对土作技术的三种主要建造方式：版筑法、椽筑法、土坯法进行研究。
Earthen walls of brick package, the city on all sides are equipped with gates, gate tower.
城墙土筑砖包，城四面都设有城门、城楼。
Earthen walls of brick package, the city on all sides are equipped with gates, gate tower.
城墙土筑砖包，城四面都设有城门、城楼。
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