In Jan. 2012, the premium screens used in Shengli oilfield have been checked and... …

The multi-spindle drilling machine buil by the company was put into use
In April 2011, the multi-spindle drilling machine buil by the company was put in... …
In Jan. 2012, the premium screens used in Shengli oilfield have been checked and... …
In April 2011, the multi-spindle drilling machine buil by the company was put in... …
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