Topographic model, deposit solid model, rock and fault solid model are built based on the study on data permutation and vectorization of original modeling data of Tongchang Copper Mine.

在对铜厂铜矿原始建模资料进行了数据转换、矢量化等研究工作的基础上，建立了整个矿山的地表模型、矿床实体模型、岩层及断层实体模型。

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Analysts in the U.S. and elsewhere call the launch facility Tongchang, because it is close to a small village by that name.

WSJ: U.S. Warns North Korea Over Rocket Launch

The new facility near Tongchang is far more advanced, with a 100-foot-tall launch tower and a below-ground tunnel to direct rocket exhaust.

WSJ: U.S. Warns North Korea Over Rocket Launch