Joint venture in oil, natural gas, coal, regenerated energy and mechanical engineering areas.

石油和天然气、煤炭、可再生能源和工程机械领域合作。

youdao

Joint venture in oil, natural gas, coal, regenerated energy and mechanical engineering areas.

石油和天然气、煤炭、可再生能源和工程机械领域合作。

youdao