혹시 tuide opec(으)로 찾으셨나요?

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• Shale Gas, Introduction of New Gold Mining Era <시사기획 창- 셰일 新금광시대를 열다> was found and stated reason why it could not be mined despite knowing the existence for such a long time It also mentioned the hegemonic battle between U.S and OPEC nation on the petrol gases. blog.naver.com · 2016.09.19