How Yumen Oilfield, China's oldest petroleum base, aids the new oilfields and at the same time taps its own potential for further development.CENTURIES ago the Kansu Corridor in western Kansu...
Please login first!
How Yumen Oilfield, China's oldest petroleum base, aids the new oilfields and at the same time taps its own potential for further development.CENTURIES ago the Kansu Corridor in western Kansu...