| 1 | In Huachi county of Qingyang In 2001, when have an overall removal mining on Double-Stone Tower of Song Dynasty, in the tower found a sachet. | |
| 2 | The lithologic reservoir of Huachi oilfield H152 well block locating in the south of Shanbei. slope of the Ordos Basin is low-porosity and low-permeability. |
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