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Fifty years ago, #CNPC 's oil explorers from Shaanxi, Gansu, and Ningxia gathered in Qingyang city and began building the Changqing #Oilfield. Now, the …
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Contact for more >>Shengli Oilfield Shengji Petroleum Equipment Company was established in 1964. We have fifty years history of design, manufacture, marketing and servicing of ...
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