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Where can I see the extension of the oil recruitment admission list?

Precautions for extending engine oil. Yanchang Petroleum is a key petroleum enterprise. See Yanchang Petroleum Announcement for the list of recruiters. Petroleum refers to the mixture of natural gaseous, liquid and solid hydrocarbons. Petroleum is divided into crude oil, natural gas, natural gas liquid and natural tar, but it is customary to use "oil" as the definition of "crude oil".