The country is strengthening the support to the west and middle region.

国家要加大对中西部地区的支持力度.

In late Holocene, relatively high crude particle content of the middle region section instructs the intensity of sandstorm of this place to be greater than the middle region.

西部地区地层中的粗颗粒含量相对较高，指示该地沙尘暴强度较大，这在全新世晚期表现尤为明显。

Technique of free- water- carrying gas production with slim-hole coiled tubing was first successfully used in pilot - testing of horizontal well in middle region of Sichuan.

川中地区小口径连续油管携自由水采气工艺技术，首次成功地在水平井中先导试验，提高了低产气井开采效果。